A dilute solution of an unknown weak monoprotic acid (HX) required a 28.62 mL titration of 0.1084 M NaOH to reach the phenolphthalein endpoint. The titrated solution was evaporated into dryness. Calculate the equivalent mass (g/mol) of the acid if the sodium salt was found to weigh exactly 0.4139 -g. (Atomic Mass of Na = 22.99 g/mol; Atomic Mass of H = 1.008 g/mol). HX + NaOH --->  NaX + H2O

Chemistry: Principles and Reactions
8th Edition
ISBN:9781305079373
Author:William L. Masterton, Cecile N. Hurley
Publisher:William L. Masterton, Cecile N. Hurley
Chapter4: Reactions In Aqueous Solution
Section: Chapter Questions
Problem 75QAP: A student is given 0.930 g of an unknown acid, which can be either oxalic acid, H2C2O4, or citric...
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A dilute solution of an unknown weak monoprotic acid (HX) required a 28.62 mL titration of 0.1084 M NaOH to reach the phenolphthalein endpoint. The titrated solution was evaporated into dryness. Calculate the equivalent mass (g/mol) of the acid if the sodium salt was found to weigh exactly 0.4139 -g. (Atomic Mass of Na = 22.99 g/mol; Atomic Mass of H = 1.008 g/mol).

HX + NaOH --->  NaX + H2O

Express you answer with 2 decimal places

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