5. Which of the following is the weakest acid? Group of answer choices   HCNO (Ka for HCNO is 2 × 10-4) HCN (Ka for HCN is 4.9 × 10-10) H3BO3 (Ka for H3BO3 is 5.4 × 10-10) HF (Ka for HF is 7.2 × 10-4)

General, Organic, and Biological Chemistry
7th Edition
ISBN:9781285853918
Author:H. Stephen Stoker
Publisher:H. Stephen Stoker
Chapter10: Acids, Bases, And Salts
Section: Chapter Questions
Problem 10.87EP: Consider the following four solutions: (1) apple juice, pH 3.8, (2) pickle juice, pH 3.5, (3)...
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5. Which of the following is the weakest acid?

Group of answer choices
 
HCNO (Ka for HCNO is 2 × 10-4)
HCN (Ka for HCN is 4.9 × 10-10)
H3BO3 (Ka for H3BO3 is 5.4 × 10-10)
HF (Ka for HF is 7.2 × 10-4)
 
 

6. Which of the following is correctly identified?

Group of answer choices
 
H2CO3, strong acid
HCl, weak base
NaOH, strong base
Ca(OH)2, weak base
NH3, strong acid
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