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What is the pH made by combining 50.0 mL of 0.12 M HCN, 50.0 mL of 0.15 M NaCN and 2.0 mol NaOH?

What is the pH made by combining 50.0 mL of 0.12 M HCN, 50.0 mL of 0.15 M NaCN and 2.0 mol NaOH? Ka of HCN = 4.9 x 10^{-10} Assume the NaOH addition does not change the buffer volume.

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Expert Solution

This question is solved by using the simple concept of determination of pH of a solution having excess of moles in the solution.

The answer is given in the image,

queen_honey_blossom answered 2 years ago
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