Calculate the pH of a 0.200 M NaCN solution.The K_a for HCN is 4.9 × 10^-10. A) 3.87 B) 11.31 C) 2.69 D) 10.13

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NaCN is a salt of a weak acid (HCN) and a strong base (NaOH). The CN- ion will hydrolyze in water to form OH- ions, making the solution basic. Using the formula for the hydrolysis of a salt of a weak acid, pH = 14 - 0.5(pKa - log(C)), where C is the concentration of the salt, we find the pH to be approximately 11.31.

Calculate the PH of a 0