Consider the K_a Values for the Following Acids: Cyanic Acid,HOCN,3

question 54

Multiple Choice

Consider the K_a values for the following acids: Cyanic acid,HOCN,3.5 × 10^-4
Formic acid,HCHO₂,1.7 × 10^-4
Lactic acid,HC₃H₅O₃,1.3 × 10^-4
Propionic acid,HC₃H₅O₂,1.3 × 10^-5
Benzoic acid,HC₇H₅O₂,6.3 × 10^-5
Given initially equimolar solutions of each weak acid,which solution will have the highest pH once equilibrium is established?

• A) HOCN
• B) HC₇H₅O₂
• C) HC₃H₅O₂
• D) HC₃H₅O₃
• E) HCHO₂

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