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11 Nov 2019
Calculate the pH of a solution that is prepared by dissolving 0.183 mol of pentafluorobenzoic acid (C6F5COOH, Ka = 3.30Ã10-2) and 0.400 mol of hydrocyanic acid (HCN, Ka = 6.17Ã10-10) in water and diluting to 2.30 L. Also, calculate the equilibrium concentrations of C6F5COOH, C6F5COO-, HCN, and CN-. Do not make an approximation unless the initial acid concentration is greater than 1000 Ã Ka. (Hint: The pH will be determined by the stronger acid of this pair.)
pH = ?
[C6F5COOH] = ? M
[C6F5COO-] = ? M
[HCN] = ? M
[CN-] = ? M
Calculate the pH of a solution that is prepared by dissolving 0.183 mol of pentafluorobenzoic acid (C6F5COOH, Ka = 3.30Ã10-2) and 0.400 mol of hydrocyanic acid (HCN, Ka = 6.17Ã10-10) in water and diluting to 2.30 L. Also, calculate the equilibrium concentrations of C6F5COOH, C6F5COO-, HCN, and CN-. Do not make an approximation unless the initial acid concentration is greater than 1000 Ã Ka. (Hint: The pH will be determined by the stronger acid of this pair.)
pH = ?
[C6F5COOH] = ? M
[C6F5COO-] = ? M
[HCN] = ? M
[CN-] = ? M
Bunny GreenfelderLv2
6 Feb 2019