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Question: a titration of 217 ml of a solution of the...

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A titration of 21.7 mL of a solution of the weak base aniline, C6H, NH2 (Kb = 4.0 × 10-10), requires 22.69 mL of 0.185 M HCI to reach the equivalence point. CoH,NH2(aq) +HO (a)CHsNHs (aq)+ H20(e) a What was the concentration of aniline in the original solution? Concentration- 0.193 Correct The equivalence point for a reaction is the point at which one reactant has been completely consumed by addition of another reactant. Thus, 0.185 mol HCl [C6H5NH2] 1.00L x22.69 mL x 1 mol C H,NH L 1 mol HCl 21.7 mL = 0.193 M b What are the concentrations of H01, OH , and Ce HsNHs+ at the equivalence point? OH
You dissolve 0.169 g of NaOH in 2.00 L of a buffer solution that has [H2P0门1HPO42-1-0.197 M. What is the pH of the solution before adding NaOH? (K, for dihydrogen phosphate ion is 6.2 x 10-3) What is the pH of the solution after adding NaOH?
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