Volume of NO gas formed from reaction of 0 .500 mol Ag with excess HNO 3 has to be determined. Concept Introduction: Change in oxidation number method to balance redox reactions. 1. Oxidation number of each element has to be assigned and change in oxidation number has to be identified. Then add electrons to balance charge. 2. Two half-reactions with only elements that have changed oxidation numbers have to be formed. 3. Both reactions multiplied by smallest whole number that can make electrons lost equal to electron gained. 4. Coefficient should be transferred to original equation. 5. Remaining oxygen atoms are balanced through water molecules. 6. For acidic medium, charge is balanced by addition of H + ion.

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Chapter 17, Problem 53CE

Interpretation Introduction

Interpretation:

Volume of NO gas formed from reaction of 0.500 mol Ag with excess HNO3 has to be determined.

Concept Introduction:

Change in oxidation number method to balance redox reactions.

1. Oxidation number of each element has to be assigned and change in oxidation number has to be identified. Then add electrons to balance charge.

2. Two half-reactions with only elements that have changed oxidation numbers have to be formed.

3. Both reactions multiplied by smallest whole number that can make electrons lost equal to electron gained.

4. Coefficient should be transferred to original equation.

5. Remaining oxygen atoms are balanced through water molecules.

6. For acidic medium, charge is balanced by addition of H+ ion.

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