How Much Solid NaCN Must Be Added to 1

question 94

Multiple Choice

How much solid NaCN must be added to 1.0 L of a 0.5 M HCN solution to produce a solution with pH 7.0? K_a = 6.2  10^-10 for HCN.

• A) 0.0034 g
• B) 0.15 g
• C) 160 g
• D) 24 g
• E) 11 g

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