Ch.15 - Acid and Base EquilibriumWorksheetSee all chapters
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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

Solution: Which of the following will have the weakest conjugate base? A. Hydrocyanic acid, HCN (Ka = 4.9 x 10-10)  B. Benzoic acid, HC7H5O2  (Ka = 6.5 x 10-5​)  C. Hypochlorous acid, HCIO (Ka = 2.9 x 10-8​) 

Problem

Which of the following will have the weakest conjugate base?

A. Hydrocyanic acid, HCN (Ka = 4.9 x 10-10
B. Benzoic acid, HC7H5O (Ka = 6.5 x 10-5​) 
C. Hypochlorous acid, HCIO (Ka = 2.9 x 10-8​) 
D. Phenol, HC6H5O (Ka = 1.3 x 10-10​) 
E. Cyanic acid, HCNO (Ka = 2.0 x 10-4​)