Ch.15 - Acid and Base EquilibriumWorksheetSee all chapters
All Chapters
Ch.1 - Intro to General Chemistry
Ch.2 - Atoms & Elements
Ch.3 - Chemical Reactions
BONUS: Lab Techniques and Procedures
BONUS: Mathematical Operations and Functions
Ch.4 - Chemical Quantities & Aqueous Reactions
Ch.5 - Gases
Ch.6 - Thermochemistry
Ch.7 - Quantum Mechanics
Ch.8 - Periodic Properties of the Elements
Ch.9 - Bonding & Molecular Structure
Ch.10 - Molecular Shapes & Valence Bond Theory
Ch.11 - Liquids, Solids & Intermolecular Forces
Ch.12 - Solutions
Ch.13 - Chemical Kinetics
Ch.14 - Chemical Equilibrium
Ch.15 - Acid and Base Equilibrium
Ch.16 - Aqueous Equilibrium
Ch. 17 - Chemical Thermodynamics
Ch.18 - Electrochemistry
Ch.19 - Nuclear Chemistry
Ch.20 - Organic Chemistry
Ch.22 - Chemistry of the Nonmetals
Ch.23 - Transition Metals and Coordination Compounds
Problem

Given the following pKa values, which is the strongest acid of those listed in the answers?

HClO2 (pKa = 2.00)

CCl3COOH (pKa = 0.52)

HIO3 (pKa = 0.77)

HBrO2 (pKa = 4.69)

HN3 (pKa = 4.72)

a. HBrO2 
b. HN3
c. CCl3COOH
d. HIO3
e. HClO2

Solution

We're being asked to identify the strongest acid based on the given pK values.

Ka represents the acid dissociation constant and it measures the strength of weak acids. In general:

• The higher the Ka the stronger the acid and the greater the concentration of H+

Ka is the negative base-10 logarithm of the base dissociation constant (Ka) of a solution.

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