Ppt on acid-base titration indicator

1 TITRATION CURVES K (A) + (R) (P) (A) + (R) (P) analyte titrant product Titration curves: 1. Strong acidstrong base,Strong base strong acid 1. Strong.

H 3 PO 4 with NaOH Introduction Titrants Titration curves End point detection Applications Outline NEUTRALIZATIONANALYSIS 8 ACID / BASE INDICATORS 1.Azo-compounds Genearal structure: Mechanism: Yellow Yellow (basic) (aromatic) Yellow Yellow (intermediate) (protonated) Red Red (acidic) (quinoid) NEUTRALIZATIONANALYSIS Outline Introduction Titrants Titration curves End p. detection - chemical - instrumental Applications 9 ACID / BASE INDICATORS ACID / BASE INDICATORS 2.PHTHALEIN-derivatives General structure/


Oxidation/reduction reaction and titration

dichromate solution is not intense enough for use in end point detection. Diphenylamine sulfonic acid is an excellent indicator for titrations with this reagent. Applications of Oxidation/Reduction Titrations Example. A 5.00-mL sample of ethanol antiseptic was diluted to 1.000/ per mole of H2O present (1:1) Applications of Oxidation/Reduction Titrations Detecting the End Point 1) An end point in a Karl Fischer titration can be observed visually based on the brown color of the excess reagent. 2) More commonly/


Chapter 15: Applications of Aqueous Equilibria - Titrations Prentice Hall John E. McMurray – Robert C. Fay GENERAL CHEMISTRY: ATOMS FIRST.

Hall John E. McMurray – Robert C. Fay GENERAL CHEMISTRY: ATOMS FIRST Titration in an acid-base titration, a solution of known concentration (titrant) is slowly added from a burette to a solution of unknown concentration in a flask until the reaction is complete when the reaction is complete we have reached the endpoint of the titration an indicator may be added to determine the endpoint an/


1. Autoionization 1. Autoionization reaction of liquid water 2. pH, pOHpK w 2. pH, pOH, and pK w 3. conjugate acid-base pairs 4. K a, K b, pK a, pK b 4.

to determine the pH of the equivalence points of these titrations. a.K base = K acid neutral solutions b. K base > K acid basic solutions c. K base < K acid acidic solutions Acid-Base Indicators The point in a titration at which chemically equivalent amounts of acid and base have reacted is called the equivalence point. The point in a titration at which a chemical indicator changes color is called the end point. A symbolic representation/


Titrimetric procedure and Acid and Base Titrations Ch 20

clamped vertically. Read the level of liquid in the burette by noting the lower level of the meniscus at eye level. Why is phenolphthalein used as the indicator in this titration? Because this is a weak acid/strong base titration, phenolphthalein changes colour in the appropriate pH range. Why is a rough titration carried out? To find the approximate end-point. This information enables the subsequent/


Part 5: Titrations & Indicators

Part 5: Titrations & Indicators Unit 8: Acids and Bases Part 5: Titrations & Indicators Titrations Commonly used to determine the amount of acid or base in a solution. Complete by adding a solution of known concentration until the substance being tested is consumed. This is called the equivalence point (a.k.a. stoichiometric point) Titration curve - graph of pH vs. volume of added acid/base Titration Units Molarity = mol/L = mmol/mL millimole (mmol) = 1/


119 Ionic Equilibria 離子平衡 : Part II Buffers 緩衝液 and Titration Curves 滴定曲線 花青素.

Curves 滴定曲線 花青素 2 Chapter Goals 1.The Common Ion Effect and Buffer Solutions ( 共同離子效應及緩衝溶液 ) 2.Buffering Action ( 緩衝作用 ) 3.Preparation of Buffer Solutions ( 緩衝溶液的製備 ) 4.Acid-Base Indicators ( 酸鹼指示劑 ) Titration Curves ( 滴定曲線 ) 5.Strong Acid/Strong Base Titration Curves 6.Weak Acid/Strong Base Titration Curves 7.Weak Acid/Weak Base Titration Curves 8.Summary of Acid-Base Calculations 3 The Common Ion Effect and Buffer Solutions Common ion effect 共同離子效應 – When a solution of a weak electrolyte is altered by/


Acids and Bases 2007-20081 Acids and Bases. Acids and Bases 2007-20082 Acids Svante Arrhenius, a Swedish chemist, defines an acid as a substance that.

by a sharp change in the color of an indicator. In an acid-base titration, indicators are substances that have distinctly different colors in acidic and basic solutions. One common indicator is phenolphthalein. Phenolphthalein indicates the presence of a/n _________. Phenolphthalein is ________ in acidic solutions, _______ in neutral solutions and ________ in basic solutions. base colorless pink colorless Acids and Bases 2007-2008111 At the equivalence point, all the KHP/


Chapter 14 Acids and Bases. Chapter 14 Section 1 – Properties of Acids and Bases Section 2 – Acid Base Theories Section 3 – Acid Base Reactions.

+ ] = 1 × 10 −7 one significant figure pH = 7.0 15.2 Determining pH and Titrations Describe how an acid-base indicator functions. Explain how to carry out an acid-base titration. Calculate the molarity of a solution from titration data. Indicators Acid-base indicators: compounds whose colors are sensitive to pH. The pH range over which an indicator changes color is called its transition interval. pH Meters pH meter determines the pH of/


Applications of Aqueous Equilibria Buffers, Acid-Base Titrations and Precipitation Reactions.

, and precipitation reactions, but they are most commonly used for analyzing solutions of acids or bases. Acid-Base Titrations Acid-base titrations are based on neutralization reactions, in which an acid is completely neutralized by a base. The progress of the reaction may be monitored using a pH meter, or pH indicators. Titrations In either method, base is added to the acid (or vice versa) until the equivalence point is reached. The equivalence point has/


APPLICATIONS OF AQUEOUS EQUILIBRIA REACTIONS AND EQUILIBRIA INVOLVING ACIDS, BASES, AND SALTS.

can be calculated by putting the concentration of the anion into the K a equation and solving for the new [H + ]. Understanding common ion problems aides understanding of buffer solutions, acid-base indicators and acid-base titration problems. Example problem Determine the [H 3 O + ] and [C 2 H 3 O 2 - ] in 0.100 M HC 2 H 3 O 2. The K a for/


Chapter 16: Aqueous Ionic Equilibrium. Buffers Solutions that resist changes in pH when an acid or base is added Act by neutralizing acid or base that.

to work mainly with added acid generally have [base] > [acid] Buffers that need to work mainly with added base generally have [acid] > [base] Titration In an acid-base titration, a solution of unknown concentration (titrant) is slowly added to a solution of known concentration from a burette until the reaction is complete – when the reaction is complete we have reached the endpoint of the titration An indicator may be added to determine/


Chapter 17 Additional Aspects of Acid-Base Equilibria Dr. Peter Warburton

we have added equal numbers of MOLES of acid and base. For strong acid – strong base neutralizations the equivalence point occurs when the pH is 7 (a neutral solution) 69 Titration curve – strong acid titrated by strong base Different end points depending on indicator 70 End point versus equivalence point Bromothymol blue is a good indicator for strong acid-strong base titrations because the end point is very close to the equivalence point/


Acids and Bases 2007-20081 Acids and Bases. Acids and Bases 2007-20082 Acids Svante Arrhenius, a Swedish chemist, defines an acid as a substance that.

by a sharp change in the color of an indicator. In an acid-base titration, indicators are substances that have distinctly different colors in acidic and basic solutions. One common indicator is phenolphthalein. Phenolphthalein indicates the presence of a/n _________. Phenolphthalein is ________ in acidic solutions, _______ in neutral solutions and ________ in basic solutions. base colorless pink colorless Acids and Bases 2007-2008118 At the equivalence point, all the KHP/


19.4 Neutralization Reactions > 1 Copyright © Pearson Education, Inc., or its affiliates. All Rights Reserved. Chemists use acid-base reactions to determine.

to a solution of unknown concentration is called a titration.Titration 19.4 Neutralization Reactions > 17 Copyright © Pearson Education, Inc., or its affiliates. All Rights Reserved. The steps in an acid-base titration are as follows: unknown 1.A measured volume of an acid solution of unknown concentration is added to a flask. 2.Several drops of an indicator are added to the solution while the flask/


Chapter 15 Acid-Base Titration and pH 1. Solution Concentrations* Molarity – one mole of solute dissolved in enough solvent (water) to make exactly one.

in chemically equivalent amounts. End point The point in a titration at which an indicator changes color. The figure below shows typical pH curves for various acid- base titrations. The equivalence points and end points are different for the various combinations of strong and weak acids and bases. Retrieved from: chemguide.co.uk 37 Determination of the acidity/alkalinity of salt solutions produced by neutralization reactions. The relative/


Acid Base Titrations AP Chemistry Chapter 15. Titration Titrations are used to determine the amount of acid or base in a solution Titrant: the solution.

a color change. Ideally the endpoint is the same as the equivalence point. Acid-Base indicators Used to detect the equivalence point in an acid- base titration These work on LeChatelier’s Principle HIn  H + + In - clear pink Changes in equilibrium result in color changes. Indicators are usually weak organic bases or acidsacid form has different color than conjugate base form. Indicators change colors at different pH’s. We select an/


Chapter 16 Lecture 2 Titrations I.Strong Acid—Strong Base Titrations A.Titration Basics 1)Titration = addition of a measurable volume of a known solution.

+ + SO 3 2- K a2 = 6.4 x 10 -8 IV.Acid-Base Indicators A.Finding the equivalence point of a titration 1)Use a pH meter a)Plot pH versus titrant volume b)Center vertical region = equivalence point 2)Use an Acid-Base Indicator a)Acid-Base Indicator = molecule that changes color based on pH b)Choose an indicator that changes color at the equivalence point c)End Point = when the/


Chapter 15 Acid-Base Equilibria AP*. AP Learning Objectives  LO 1.20 The student can design, and/or interpret data from an experiment that uses titration.

the observations to the reversibility of the underlying chemical reactions or processes.  Additional AP References  LO 1.20 (see APEC 4, “Analysis of Vinegar”) Section 15.5 Acid-Base Indicators  Marks the end point of a titration by changing color.  The equivalence point is not necessarily the same as the end point (but they are ideally as close as possible). Copyright © Cengage Learning. All/


Applications of Aqueous Equilibria Buffers, Acid-Base Titrations and Precipitation Reactions.

, and precipitation reactions, but they are most commonly used for analyzing solutions of acids or bases. Acid-Base Titrations Acid-base titrations are based on neutralization reactions, in which an acid is completely neutralized by a base. The progress of the reaction may be monitored using a pH meter, or pH indicators. Titrations In either method, base is added to the acid (or vice versa) until the equivalence point is reached. The equivalence point has/


THEME: Coligative properties of biological liquids. Bases of titrimetric (volumetric) analysis. Complex compound in biological systems. LECTURE 1 ass.

basic solutions, or by observing the cessation of CO 2 effervescence when neutralizing CO 3 2–. The accuracy of an acid-base titration was limited by the usefulness of the indicator and by the lack of a strong base titrant for the analysis of weak acids. Titrations Based on Complexation Reactions The earliest titrimetric applications involving metal-ligand complexation The use of a monodentate ligand, such as Cl/


Aqueous Equilibria Unit 19 Acid Base Equilibria: Titrations Dr. Jorge L. Alonso Miami-Dade College – Kendall Campus Miami, FL CHM 1046: General Chemistry.

is the concentration of H 2 SO 4 in the solution of unknown concentration? = 0.098 M H 2 SO 4 Titration of a Strong Acid with a Strong Base Aqueous Equilibria Titration Graph: pH vs. Volume Excess acid Excess base Acid = Base Methyl Red Indicator Phenolphthalein Indicator {Titration2} SA SB pH meter mL of NaOH pH 0 1.2 10 1.4 20 1.6 30 1.7 40/


ACIDS AND BASES. REVISE pH = -log [H + ] pOH = -log [OH - ] pH + pOH = 14 at 25 o C Neutral:pH = 7([H + ] = [OH - ]) Acidic:pH [OH - ]) Basic:pH > 7([H.

of graph Extrapolate graph to get V e FINDING END POINTS WITH INDICATORS Acid-base indicatoracid or base itself Various protonated species have different colours HIn H + + In - Choose indicator whose colour change is as close as possible to the pH of the end point Indicators transition range overlaps the steepest part of the titration curve Indicator error: difference between the observed end point (colour change) and the true/


CHAPTER 17 Acid-Base Equilibriu and Solubility Equilibria.

as close as possible to the equivalence point for the titration. Phenolphthalein is a suitable indicator for both the strong acid+strong base titration (blue line) and weak acid+strong base titration (red line). Methyl red is a suitable indicator only for the strong acid+strong base titration. Other indicators would also be suitable choices. Titration of a Strong Base With a Strong Acid Consider the titration of 25.00 mL of a 0.0100 M solution/


Pharmaceutical Analytical Chemistry 1. Course Topics 1.Acid-Base Titration 2.Precipitation and Complex-formation Titration 3.Oxidation-reduction Titration.

8 Blue color at pH 10 44 Neutralization Titration Curves Titration curve is the plot of pH versus the volume of titrant Titration curves are constructed to - study the feasibility of titration - choosing indicator 1- Titration curve of strong acid Vs strong base - e.g. HCl against NaOH. 1- At beginning, pH of acid. pH = - log [H + ] 2- During titration, pH of strong acid. pH = pCa 3- At the end point/


Acids and Bases 2009-20101 Acids and Bases. Acids and Bases 2009-20102 Acids Svante Arrhenius, a Swedish chemist, defines an acid as a substance that.

by a sharp change in the color of an indicator. In an acid-base titration, indicators are substances that have distinctly different colors in acidic and basic solutions. One common indicator is phenolphthalein. Phenolphthalein indicates the presence of a/n _________. Phenolphthalein is ________ in acidic solutions, _______ in neutral solutions and ________ in basic solutions. base colorless pink colorless Acids and Bases 2009-2010124 At the equivalence point, all the KHP/


Objectives Describe how an acid-base indicator functions. Explain how to carry out an acid-base titration. Calculate the molarity of a solution from titration.

Objectives Describe how an acid-base indicator functions. Explain how to carry out an acid-base titration. Calculate the molarity of a solution from titration data. Chapter 15 Section 2 Determining pH and Titrations Indicators and pH Meters Acid-base indicators are compounds whose colors are sensitive to pH. Indicators change colors because they are either weak acids or weak bases. Chapter 15 Section 2 Determining pH and Titrations H In and In  are different colors. In/


19-1 Ionic Equilibria in Aqueous Systems. 19-2 Ionic Equilibria in Aqueous Systems 19.1 Equilibria of Acid-Base Buffers 19.2 Acid-Base Titration Curves.

. 19-22 pH Colors and approximate pH range of some common acid-base indicators. 19-23 The color change of the indicator bromthymol blue. pH < 6.0pH > 7.5pH = 6.0-7.5 19-24 Acid-Base Titrations In an acid-base titration, the concentration of an acid (or a base) is determined by neutralizing the acid (or base) with a solution of base (or acid) of known concentration. The equivalence point of the reaction occurs/


Solution Analyze We are asked to give the conjugate base for several acids and the conjugate acid for several bases. Plan The conjugate base of a substance.

100.0 mL of 0.050 M NH 3 with 0.10 M HCl Copyright © Cengage Learning. All rights reserved 109 Section 15.5 Acid-Base Indicators  Marks the end point of a titration by changing color.  The equivalence point is not necessarily the same as the end point (but they are ideally as close as possible). Copyright © Cengage Learning. All rights reserved 110/


Acids and Bases Titrations. Acids and Bases - 3 Definitions Arrhenius Arrhenius Bronsted-Lowry Bronsted-Lowry Lewis Lewis.

visual indicator changes color as …… Equivalence point = pH at which moles of acid equal moles of base Equivalence point = pH at which moles of acid equal moles of base Types of Acid-Base Titrations 1) Strong acid - Strong base: Either of both can be used as titrant or titrand. 2) Strong acid – Weak base Strong acid is Titrant and weak base is Titrand 3) Weak acid – Strong base Strong base is Titrant and weak acid is Titrand Titration Curves/


Chapter 10 Acid-Base Titrations. 10-1 Titration of Strong Base with Strong Acid Standard solution(titrant): Strong acid (H + ) Analyte: Strong base (OH.

BH +. ⇒ Plot V b 10 -pH vs V b 10-6 Finding the End Point with Indicator pK 1 = 1.7pK 2 = 8.9 Thymol Blue - Acid-Base Indicators (HIn) are weak acids or bases. : Change color with pH (Different protonated species have different colors) Indicators: compound added in an acid-base titration to allow end point detection pH[Y - ]:[R]Color 0.71:10RedpK 1 -1 1.71:1OrangepK/


Ionic Equilibria pH, Ka, pKa, Kw

Ionic Equilibria pH, Ka, pKa, Kw pH of strong and weak acid and strong base Acid-base indicators Change in pH of acid-base titration Buffer solution Solubility product, Ksp Common ion effect The pH scale pH is a measure of [H+(aq)] in an aqueous solution. pH = -log10[H+] In most aqueous solution, the /


Titration curves.

the concentration of the HCl. NaOH(aq) + HCl(aq) → NaCl(aq) + H2O(l) No-one would choose to do an acid-base titration this way if they didn’t have to: its much easier to use an indicator if you can. However, if acid-base indicators aren’t working – perhaps because one of the solutions is strongly coloured – then plotting graphs like this will work. But there/


Three important elements in Winemaking

. Cost $16.00 Acidometer - Vinoferm Complete kit to determine the acidity of musts and wines. Contains graduated cylinder, blue indicator solution, litmus paper and complete instructions. Cost $23.00 TA by Titration For most kits, you add a 15 cc sample of strained and/ensuring the wine does not suffer from oxidation or further processing. SO2 is often removed from wine by aerating. This is based on the slow oxidation of the SO2 and is only really suitable for slightly excessive doses of SO2. Free SO2 can be/


EDTA Titrations Introduction 1.) Metal Chelate Complexes

6 nitrogens & oxygens in its structure giving it 6 free electron pairs that it can donate to metal ions. High Kf values 6 acid-base sites in its structure EDTA Titrations EDTA 2.) Acid-Base Forms EDTA exists in up to 7 different acid-base forms depending on the solution pH. The most basic form (Y4-) is the one which primarily reacts with metal ions. EDTA-Mn/


Acid-Base Equilibria (Titrations & Indicators) Green & Damji Chapter 8, Sections 18.3 & 18.4 Chang Chapter 16 Copyright © The McGraw-Hill Companies, Inc.

Companies, Inc. Permission required for reproduction or display. Section 18. 4 Acid-Base Titrations In a titration a solution of accurately known concentration is added gradually added to another solution of unknown concentration until the chemical reaction between the two solutions is complete. Equivalence point – the point at which the reaction is complete Indicator – substance that changes color at (or near) the equivalence point Slowly/


Topic 1C – Part II Acid Base Equilibria and Ksp

change in pH These changes can be summarized using titration curve plots. We use an indicator, a chemical that changes colors at various pH’s. Most acid-base titrations involve the addition of one colorless solution to another colorless/base) Indicators pH=pKa + log([HIn]/[In-]) = pKa + log(10) pH=pKa+1 on the way down (adding an acid) For strong acid base titrations, the indicator color change is sharp and a wide range of indicators , might be suitable. For titrations of weak acids choose the indicator/


Principles & Modern Applications

. 2. 1. In the titration of a weak acid with a strong base methyl red was used as the indicator. Which of the points on the titration curve to the right represents the endpoint in the titration? 5. 4. 3. 2. 1. When titrating a solution containing a weak acid such as acetic acid, the pH at the endpoint of the titration: 1. depends on the indicator used 2. is below/


Chapter 18: Equilibria in Solutions of Weak Acids and Bases All weak acids behave the same way in aqueous solution: they partially ionize In terms of the.

water –Sodium carbonate is the sodium salt of carbonic acid –It is soluble in water –Simplifying assumptions like those made for the acid ionization can be made: The overall procedure for an acid-base titration was discussed in Section 5.13 The titration stops at the end point, as indicated by a color change of an acid-base indicator If the indicator was properly selected, the end point is very near/


Acids and Bases Titrations AP Chemistry. Neutralization Reactions and Titrations Neutralization Reactions Strong acid + Strong Base  Salt + Water HCl.

on the pH by the A- is negligible compared to the excess OH-. Weak Base – Strong Acid Titrations When a sample of a weak base is titrated with a strong acid, the curve resembles an inverted Weak Acid – Strong Base titration curve. Note that the pH at the equivalence point is less than 7. An indicator such as phenolphthalein that changes at pH of 9 would change when only 6/


Acids and Bases-Review

in total pOH = 3.78 pH = 10.22 Acid-Base Titrations Weak Acid-Strong Base Titrations The weaker the acid, the smaller the equivalence point inflection. For very weak acids, it is impossible to detect the equivalence point. Choose an indicator with a Ka range suited to the weak acid. Titration of weak bases with strong acids have similar features to weak acid-strong base titrations. Acid-Base Indicators HIn(aq.) H+ (aq.) +In- (aq.) Usually dyes that are/


Unit 8: Acids and Bases Part 5: Titrations & Indicators.

Unit 8: Acids and Bases Part 5: Titrations & Indicators Titrations  Commonly used to determine the amount of acid or base in a solution.  Complete by adding a solution of known concentration until the substance being tested is consumed. This is called the equivalence point (a.k.a. stoichiometric point)  Titration curve - graph of pH vs. volume of added acid/base Titration Units  millimole (mmol) = 1/1000 mol = 10 -3 mol  Molarity = mol/


Common Ion Effect, Hydrolysis, Titration Chapter 19.

achievement of the equivalence point in a titration reaction. Indicators are often used to visually signal the approach and achievement of the equivalence point in a titration reaction. The Titration Experiment We use this instrumentation setup to calculate the amount of unknown acid in the receiving flask by measuring the amount of base, or titrant, it takes to neutralize the acid. We use this instrumentation setup to/


Buffers and Titrations SSS 3 Class 3. Materials 0.5 M Solutions VinegarNaOH HCl ammonia Sodium Acetate Ammonium Chloride water buffer.

has a pKa close to pH at the endpoint in the titration. Copyright © Cengage Learning. All rights reserved 22 Indicators The Acid and Base Forms of the Indicator Phenolphthalein Copyright © Cengage Learning. All rights reserved 23 Acid Base Multiple Choice 1 In the titration of a weak acid of unknown concentration with a standard solution of a strong base, a pH meter was used to follow the progress of the/


Weak Acid/Strong Base calculations

Weak Acid/Strong Base calculations Acids & Bases Lesson 12 Titration Curves & Weak Acid/Strong Base calculations Titration Curves  A titration curve is a graph of the pH changes that occur during an acid-base titration versus the volume of acid or base added.   The equivalence point is the end of a titration where the stoichiometry of the reaction is exactly satisfied, or moles H+ = moles OH-. The transition point refers to when an indicator changes color and/


Chapter 15 AcidBase Equilibria. Chapter 15 Table of Contents Copyright © Cengage Learning. All rights reserved 2 15.1Solutions of Acids or Bases Containing.

reserved 42 Marks the end point of a titration by changing color. The equivalence point is not necessarily the same as the end point (but they are ideally as close as possible). Section 15.5 AcidBase Indicators Return to TOC Copyright © Cengage Learning. All rights reserved 43 The Acid and Base Forms of the Indicator Phenolphthalein Section 15.5 AcidBase Indicators Return to TOC Copyright © Cengage Learning. All/


Titration.  Titration Analytical method in which a standard solution is used to determine the concentration of an unknown solution. standard solution.

and water changes to pink color pH endpoint equivalence point base 7 pink Titration Calibration Curve Acid (mL) Base (mL) pH endpoint equivalence point indicator base 7 pink - changes color to indicate pH change e.g. phenolphthalein is colorless in acid and pink in basic solution Pirate…”Walk the plank” /26.00 11.30 30.00 11.96 40.00 12.36 NaOH added (mL) pH Titration Data Titration of a Weak Acid With a Strong Base Phenolphthalein is best indicator: pH change 8.0 - 9.6 equivalence point 14.0 12.0 10.0 8./


Chapter 15: Acid / Base Chemistry

solution (called the sample). Equivalence point – the volume of titrant required to neutralize the sample (# mol acid = # mol base). Endpoint – the pH at the equivalence point of a titration. Indicator – a chemical which is added to the sample that changes colour at the equivalence point of a titration. Buffering region – a horizontal region of the pH curve where pH is not changing significantly. Interpreting pH/


© University of South Carolina Board of Trustees Calculate the pH in the titration of 100.0 mL of 0.200 M HCl with 0.400 M NaOH after a) 0.00 mL strong.

Change with 1 Drop © University of South Carolina Board of Trustees Want p K a Indicator ~ pH of Equiv. Point © University of South Carolina Board of Trustees pH Indicators Weak acid/base conjugate pair Acid and base forms are different colors Small amount used. Little affect on pH. © University of South Carolina Board of Trustees Titration - Indicator Detection Equivalence Point: pH and color change suddenly color change KaKa


Acid/Base Titration. AcidBase Titration The concentration of a weak acid or a weak base in water is difficult – if not impossible – to measure directly.

a substance that changes color at a certain pH AcidBase Titration Most of the time we use the common indicator Phenolphthalein. –Phenolphthalein is clear in acid –Light pink in neutral –Dark pink in base Most of the time we use the common indicator Phenolphthalein. –Phenolphthalein is clear in acid –Light pink in neutral –Dark pink in base Procedure for Titration the standard is slowly added to the unknown soln/


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