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pH and Indicators Chemistry Mrs. Coyle
Basic 14>ph>7 Neutral ph=7 Acidic 1
"name": "Basic 14>ph>7 Neutral ph=7 Acidic 1ph>7 Neutral ph=7 Acidic 1
Self Ionization of H 2 O H 2 O H + (aq) + OH - (aq) Ion Product Constant K w for Water: K w = [H + ] x [OH - ] =1.0 x 10 -14
For pure H 2 O [H + ] = [OH - ] = 1.0 x 10 -7 M
pH 1909 Soren Sorensen (Danish) pH=-log[H + ] What is the pH of pure water?
Ex 1: Find the pH for [H + ]=10 -3 M Answer: pH=3
Ex 2: Find the pH for [H + ]=5x10 -3 M Answer: pH=2.3
Finding [H + ] from pH [H + ]= 10 -pH
Ex 3: Find the [H + ] for pH=5 Answer: [H + ] = 10 -5 M
Ex 4: Find the [H + ] for pH=5.8 [H + ]= 10 -pH Answer: [H + ] = 1.6x10 -6 M
pOH pH=-log[H + ] pH + pOH=14
Basic(Alkaline) Solutions Acidic Solutions Neutral Solutions
Acids Change phenolphthalein to colorless.
Acids Turn litmus paper from blue to red.
Bases Change phenolphthalein to pink.
Salts in Solution Mrs. Coyle. Solutions of Salts -Strong Acids and Strong Bases Produce a neutral solution (pH=7) Example: HCl + NaOH NaCl + H 2 O Strong.
The pH scale.
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PH of Weak Acids AP Chemistry Unit 9 Chapter 14. Strengths of Acids and Bases “Strength” refers to how much an acid or base ionizes in a solution. STRONGWEAK.
PH and concentration.
Acid - Base Titration. What is a Titration? A titration is a procedure used in chemistry to determine the concentration of an unknown acid or base. A.
PH Indicator. Why? and Observations To check if the substance was acidic, neutral or basic Different liquids changed different colors based on the.
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Openers 5-18 to 5-22 Chemistry. Monday What is the pH of a solution with [OH - ]=6.7x10 -5 M ?
Aqueous solutions & concepts of pH Chapter I. Ion Product constant - water A. Acids→ hydronium ions (H 3 O+) Bases → hydroxide ions (OH-) B.Self.
PH. pH—Scale to measure how acidic or basic a solution is 0-14 Pure water is 7 and neutral (not an acid or base) Acids—less than 7(lower number more acidic)
pH scale Measures the amount of H + in a solution. Scale used to measure whether a substance is an acid or a base. Lower numbers are acids. Higher numbers.
Ways to measure Acidity/Basicity What is pH? What is pOH?
Acid-Base Notes. Acid- Compound that forms hydrogen ions (H + ) when dissolved in water Base – compounds that forms hydroxide ion (OH - ) when dissolved.
Learning outcomes: To know what the pH scale is. Know how to measure pH Give examples of different acids and alkalis. Read page 56 and 57.
CHEMISTRY Mrs. Huls. CHEMISTRY Elements CompoundsMixtures Atoms.
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Mixtures & Solutions Biology.
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PH is the measurement of the concentration of H+ ions in a solution. (Or how acidic or basic a solution is.) 1. The pH scale has a range from 1 to 14.
Acids and Bases. Ionization of Water H 2 O + H 2 O H 3 O + + OH - K w = [H 3 O + ][OH - ] = 1.0
Acids, Bases, and Solutions
Chemistry Chapter Acids and Bases. (Self-Ionization of Water) H 2 O + H 2 O H 3 O + + OH - Two water molecules collide to form Hydronium and.
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CHEMISTRY Unit 10 Notes: Acid & Base Stuff. (1) Acids Release H+ (hydrogen ions) when they dissociate in water. Common Characteristics: – pH = 0-6 – Indicator.
INDICATORS & pH: Part 2 What is the difference between an acid and a base? Acid: H 3 O + (hydronium) ion Base: OH - (hydroxyl) ion Acids: react with metals.
Example 15.6: Find the pH of M HNO 2 (aq) 25 °C 9 Tro, Chemistry: A Molecular Approach, 2/e.
PH Scale. Ion product constant for water K w H 2 O H + + OH - K w = [H + ] [OH - ] = 1.0 X mol/L Since [H + ] = [OH - ] for water Then each equals.
Acids and Base Review: Ch Trish Loeblein phet.colorado.edu Loeblein’s Chemistry PhET clicker questions.
pH Water Water is in equilibrium with its ions H 2 O(l) H + (aq) + OH - (aq) K w = [H + ][OH - ] K w = 1.0 x at 25°C In neutral solutions [H.
PH Scale Standard: 5d-students know how to use the pH scale to characterize acid and base solutions.
L4: pH scale Learning Objectives: 1.Use the pH scale to describe substances as weak or strong acids or alkalis. 2.Describe how universal indicator is used.
PH Worksheet Strength of Acids and Bases. 1. Is pure water an acidic, basic or neutral substance? Neutral.
Acids and Bases # 2.
PH ( power of hydronium ion). The pH scale is a way of expressing the strength of acids and bases. Instead of using very small numbers, we just use the.
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PH and Concentration. pH Recall water H 2 O H + + OH - Every water molecule produces one hydrogen ion and one hydroxide ion At equilibrium, K eq = [products]
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Slide 1 of Acid-Base Indicators Color of some substances depends on the pH. HIn + H 2 O In - + H 3 O + In the acid form the color appears to.
Ch Acids & Bases III. Neutralization (p ) Neutralization Reaction Titration.
Indicators and pH Objective:
General, Organic, and Biological Chemistry Copyright © 2010 Pearson Education, Inc.1 The pH Scale.
Aim: How do chemists write neutralization reactions and interpret changes in acid-base indicator color? In the process of neutralization, an Arrhenius.
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