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pH and pOH By: Sam F., Sam D., Rochani, Evan, Will, Sherry, Mariana
pH ● Measure of the acidity or basicity of an aqueous solution ● Acid: ● Base: ● 7 is neutral
pH Calculation ● pH=-log [H+] ● Molarity of acid = [H+] ● Ex: o.1 M HCl what is the pH? o.001 M HBr what is the pH?
pOH ● measures the concentration of the hydroxide ion ● Acid: 7-14 ● Base: 0-7 ● 7 is neutral
pOH Calculation ● pOH= -log [OH-] ● Molarity of base= [OH-] ● Ex: o.0001 M Ca(OH)2 what is pOH? o.01 M Ba(OH)2 what is pOH?
pH and pOH scale
Relationship ● Use this to find the pH or pOH: o pH+pOH=14 ● Ex: o.001 M NaOH what’s the pH? o M HCl, what’s the pOH?
Relationship ● To find [H+] and [OH-] use: o [OH-]=10^-pOH o [H+]=10^-pH ● Ex: o pH is 7.4 what is the [H+]? o pOH is 6.3 what is [OH-]?
Acids and Bases. Ionization of Water H 2 O + H 2 O H 3 O + + OH - K w = [H 3 O + ][OH - ] = 1.0
PH and pOH Ways to measure Acidity/Basicity What is pH? What is pOH?
PH (potential of Hydrogen). According to the Bronsted-Lowry theory, both acids and bases are related to the concentration of hydrogen ions. Acids will.
PH worksheet (#1). 1. What is the pH of a solution with a hydrogen ion concentration of 1.0 x M? pH = -log [H + ] = - log (1.0 x ) = 5.
Yesterday’s Homework Page 611 # 19 Page 612 # 20.
C. Johannesson Ch. 15 & 16 - Acids & Bases II. pH (p )
Acids & Bases pH. Ionization of Water H 2 O + H 2 O H 3 O + + OH - K w = [H 3 O + ][OH - ] = 1.0 Kw=ionization constant for H2O.
PH. Definitions and Formulas The pH scale is defined as the negative log of the concentration of H + : pH = -log[H + ] The pOH scale is defined as the.
pH: The negative of the common logarithm of the hydronium ion concentration [H 3 O + ] ◦ pH stands for the French words pouvoir hydrogene, meaning “hydrogen.
Calculating pH and pOH. pH pH = - log [H + ] [H + ] = the hydrogen ion concentration pH: “potential of hydrogen” - A way of expressing the hydrogen ion.
PH and pOH Chem 332 – ODette. pH (Potential of Hydrogen) Measures the degree of acidity or basicity of an aqueous solution Corresponds to the hydrogen.
Ch.15: Acid-Base and pH Part 1. Self-Ionization of Water Pure water is a VERY weak electrolyte It undergoes self-ionization H 2 O (l) + H 2 O (l) H 3.
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.
Examples-pH and pOH. Example Find the pH of a 0.03 M solution of HBr.
Acids and Bases pH Calculations pH scale. pH Scale Created to express acidity as a more simple number than molarity. pH stands for “power” of the hydrogen.
NOTES: 19.2 – Hydrogen Ions & Acidity (pH and pOH)
Continuing into the world of acids and bases…. pH of a solution is the negative logarithm of the hydrogen ion concentration pH = -log [H + ] This.
[H 3 O + ] Aqueous Solutions Brackets means concentration (Molarity) 1x10 -7 M neutral 1x10 -5 M 1x10 -9 M acidic = > [OH - ] acid base M
PH. There is a formula to find pH pH = -log [H + ] or pH = -log [H 3 O + ] – (brackets around a substance means that substances concentration in molarity)
TOPIC: pH 1. NaCl 2. C 2 H 5 OH 3. H 2 SO 4 4. NaOH 5. C 12 H 22 O CaI 2 7. HF 8. Mg(OH) 2 9. NH 3 10.CH 3 COOH Do Now: Identify as acid, base, salt,
PH and concentration. HIGHER GRADE CHEMISTRY CALCULATIONS pH and Concentration pH is related to the concentration of hydrogen ions. e.g [H + (aq)] = 1.
Acid/Base Indicators Substance that changes color in the presence of an acid or a base – Red or Blue Litmus – Phenolphthalein (phth) – Bromothymol blue.
Aqueous solutions & concepts of pH Chapter I. Ion Product constant - water A. Acids→ hydronium ions (H 3 O+) Bases → hydroxide ions (OH-) B.Self.
Ch. 19 – Acids & Bases II. pH (p. 644 – 658). A. Ionization of Water H 2 O + H 2 O H 3 O + + OH - Self-Ionization of Water.
A bit more on the pH scale. (molar concentrations of H + and OH - ions) ACIDS BASES Contain greater number of H+ ions than OH- ions pH of (0-6.9)) Contain.
Acid-Base Notes. Acid- Compound that forms hydrogen ions (H + ) when dissolved in water Base – compounds that forms hydroxide ion (OH - ) when dissolved.
TEKS 10I: Define pH and use the hydrogen or hydroxide ion concentrations to calculate the pH of a solution. How is pH defined? The pH of a solution is.
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.
PH – A Measure of Acidity and Basicity Logarithm: In mathematics, the logarithm of a number is the exponent to which another fixed value, the base, must.
Unit: Acids, Bases, and Solutions Calculations with Acids and Bases Day 2 - Notes.
* Name the following acids: * HI * HNO 3 * HCl * Write the formula for the following acids: * Hydrofluoric Acid * Nitrous Acid * Hydrobromic acid.
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.
The definitions of acids and bases have changed over time. Arrhenius Definition of Acids and Bases: An acid is any substance that adds hydrogen ion (H+)
Chapter 11. Equations M = n/V M 1 V 1 = M 2 V 2 if the moles are the same n 1 n 2 you can cancel out the n’s. pH = -log [H + ] pOH = -log [OH - ] pH +
What is pH?. Ion Product Constant for Water H 2 O(l) H + (aq) + OH - (aq) Keq = Kw = [H + ] x [OH - ] The ion product constant for water (Kw)
Section 18-3 Section 18.3 Hydrogen Ions and pH Explain pH and pOH. Relate pH and pOH to the ion product constant for water. Calculate the pH and pOH of.
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.
Wake-up Write down each equation below. Identify the base (B), acid (A), conjugate acid (CA), and conjugate base (CB). 1.NH 3 + HCN NH 4 + CN 1.HSO 4.
Aim: How to determine if a solution is acidic, basic, or neutral.
Chapter 16: Equilibrium in Acid-Base Systems 16.1a: Self-ionization of Water K w pH and pOH.
1 Chapter 10 Acids and Bases 10.6 The pH Scale. 2 pH Scale The pH scale: Is used to indicate the acidity of a solution. Has values that usually range.
Chapter 19 More about ACID-BASES. Self-Ionization of Water Two water molecules produce a hydronium ion & a hydroxide ion by the transfer of a proton.
Intro to Acids & Bases. Ions in Solution ____________ – contain more H + than OH - ____________ – contain more OH - than H + ____________ – contain equal.
Checking Ch 15.1 A C I D - B A S E T I T R A T I O N A N D p H.
Acids & Bases Lesson 6 Strong Acid-Base Calculations.
Hydrogen Ions and Acidity Chapter What is K w ? K w is the equilibrium constant for the self-ionization of water Water molecules are in constant.
Acid / Base Equilibria A Practical Application of the Principles of Equilibrium.
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