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How many grams of solid sodium cyanide should be added to 1.00L of a 0.277M hydrocyanic acid solution to prepare a buffer with a pH of 8.800?(Ka(HCN)=4.001010) Mass = 9 Use the References to access important values if needed for this question. How many grams of solid ammonium bromide should be added to 0.500L of a 0.265M ammonia solution to prepare a buffer with a pH of 9.940 ? Mass = g