Hydrocyanic Acid,HCN,is a Weak Acid Whose K_a Value Is 4

question 26

Multiple Choice

Hydrocyanic acid,HCN,is a weak acid whose K_a value is 4.0 10^-10.What is the pH of a 0.10 M solution of HCN?

• A)1.0
• B)5.2
• C)9.4
• D)10.

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