A chemistry graduate student is given 500. mL of a 1.60 M hydrocyanic acid (HCN) solution. Hydrocyanic acid is a weak acid with K_a = 4.9 times 10^-10. What mass of KCN should the student dissolve in the HCN solution to turn it into a buffer with pH = 9.16? You may assume that the volume of the solution doesn't change when the KCN is dissolved in it. Be sure your answer has a unit symbol, and round to 2 significant digits.
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A chemistry graduate student is given 500. mL of a 1.60 M hydrocyanic acid (HCN) solution. Hydrocyan...
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