Cr20;²- (ag) +I(ag)¬Cr* (ag) + IO; (ag) (acidic solution)Express your answer as a chemical equation. Identify all of the phases in your answer.

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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

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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Cr20;²- (ag) +I(ag)¬Cr* (ag) + IO; (ag) (acidic solution)
Express your answer as a chemical equation. Identify all of the phases in your answer.

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The half reaction method or ion- electron method is used for balancing a redox reaction. It can be done in acidic or basic medium. In both medium we follow similar steps. The only difference is that in acidic medium we will have hydronium ion and in basic medium we will have hydroxide ion for balancing hydrogen.

Half reaction method in acidic medium involves several steps. They are as follows.

Separate the half reactions
Balance all the elements other than oxygen and hydrogen
Add water to balance oxygen
Since the medium is acidic add hydronium ion for balancing hydrogen
Balance charge by adding electron
Balance no of electrons in each half reaction
Add both reactions and cancel out common terms

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