The PH of 0

question 30

Multiple Choice

The pH of 0.255 M HCN is 4.95.What is the value of K_a for hydrocyanic acid?

• A)1.3 × 10^-10
• B)4.9 × 10^-10
• C)1.1 × 10^-5
• D)4.4 × 10^-5

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