Exactly 75.00 mL of a 0.3132 M solution of Na2SO3 were treated with 150.0 mL of 0.4025

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Exactly 75.00 mL of a 0.3132 M solution of Na2SO3 were treated with 150.0 mL of 0.4025 M HClO4 and boiled to remove the SO2 formed.
(a) What was the mass in grams of SO2 that was evolved?
(b) What was the concentration of the un-reacted reagent (Na2SO3 or HClO4) after the reaction was complete?
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Fundamentals of Analytical Chemistry

ISBN: 978-0495558286

9th edition

Authors: Douglas A. Skoog, Donald M. West, F. James Holler, Stanley R. Crouch

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