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 evolved? (b) What was the concentration of the unreacted reagent (Na2SO3 or HClO4) after the reaction was complete?

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Science

Chemistry

concentration

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter22: Organic And Biological Molecules

Section: Chapter Questions

Problem 157CP

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Chemical Reactions and Equations

When a chemical species is transformed into another chemical species it is said to have undergone a chemical reaction. It consists of breaking existing bonds and forming new bonds by changing the position of electrons. These reactions are best explained using a chemical equation.

Question

Exactly 75.00 mL of a 0.3132 M solution of Na₂SO₃ were treated with 150.0 mL of 0.4025 M HClO₄and boiled to remove the SO₂ formed.

(a) What was the mass in grams of SO₂ that evolved?

(b) What was the concentration of the unreacted reagent (Na₂SO₃ or HClO₄) after the reaction was complete?

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