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In: Chemistry

2. Consider a buffer made with hydrocyanic acid (HCN) and sodium cyanide. a. What chemical reaction...

2. Consider a buffer made with hydrocyanic acid (HCN) and sodium cyanide.

a. What chemical reaction would describe the acid/base reaction occurring in the buffer?

b. You are instructed to dissolve 4.05 grams of hydrocyanic acid in 0.500 L of water. What is the molarity of hydrocyanic acid in solution?

c. You are also instructed to dissolve 9.80 g of sodium cyanide in that same 0.500 L of water. What is the molarity of the sodium cyanide in solution?

d. Calculate the pH of a buffer made by dissolving 4.05 grams of hydrocyanic acid (HCN) and 9.80 g sodium cyanide in 0.500 L of water. Assume the volume of the solution is 0.500 L. The Ka of cyanic acid is 4.9 × 10-10. You may do this either with an ICE table or the H-H equation.

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queen_honey_blossom answered 2 years ago
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