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A chemistry graduate student is given 300. mL of a 0.20M hydrocyanic acid (HCN) solution. Hydrocyanic acid is a weak acid with K. =4.9


A chemistry graduate student is given 300. mL of a 0.20M hydrocyanic acid (HCN) solution. Hydrocyanic acid is a weak acid with K. =4.9 x 10 -10 What mass of KCN should the student dissolve in the HCN solution to turn it into a buffer with pH =9.11? 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 it to 2 significant digits. alo Ar Ox10

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