A 5.95-g sample of an acid, H₂X, requires 45.0 mL of a 0.500 M NaOH solution for complete reaction (removing both protons). What is the molar mass of the acid expressed in grams per mol? A) 529 B) 264 C) 178 D) 132 E) none of these

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Quizplus · Accepted Answer

The balanced chemical equation is:H₂X + 2NaOH → Na₂X + 2H₂OMoles of NaOH = (0.500 M) x (0.0450 L) = 0.0225 molMoles of H₂X = 0.0225 mol / 2 = 0.01125 molMolar mass of H₂X = 5.95 g / 0.01125 mol = 529 g/mol

A 595-G Sample of an Acid, H2X, Requires 45

A 595-G Sample of an Acid, H₂X, Requires 45