Question

Which of the following equations are balanced? (a) The development reaction in silver-halide photography: $2 \mathrm{AgBr}+2 \mathrm{NaOH}+\mathrm{C}_{6} \mathrm{H}_{6} \mathrm{O}_{2} \longrightarrow$ $2 \mathrm{Ag}+\mathrm{H}_{2} \mathrm{O}+2 \mathrm{NaBr}+\mathrm{C}_{6} \mathrm{H}_{4} \mathrm{O}_{2}$ (b) The preparation of household bleach: $2 \mathrm{NaOH}+\mathrm{Cl}_{2} \longrightarrow \mathrm{NaOCl}+\mathrm{NaCl}+\mathrm{H}_{2} \mathrm{O}$

Name: Problem 38, Chapter 3: Chemistry
Uploaded: 2020-04-23T18:26:42-08:00
Duration: 2 min 32 s
Channel: Nadia Lara
Description: Which of the following equations are balanced? (a) The development reaction in silver-halide photography: 2 AgBr+2 NaOH+C6 H6 O2 ⟶2 Ag+H2 O+2 NaBr+C6 H4 O2 (b) The preparation of household bleach: 2 NaOH+Cl2 ⟶NaOCl+NaCl+H2 O

   Which of the following equations are balanced?
(a) The development reaction in silver-halide photography:
$2 \mathrm{AgBr}+2 \mathrm{NaOH}+\mathrm{C}_{6} \mathrm{H}_{6} \mathrm{O}_{2} \longrightarrow$
$2 \mathrm{Ag}+\mathrm{H}_{2} \mathrm{O}+2 \mathrm{NaBr}+\mathrm{C}_{6} \mathrm{H}_{4} \mathrm{O}_{2}$
(b) The preparation of household bleach:
$2 \mathrm{NaOH}+\mathrm{Cl}_{2} \longrightarrow \mathrm{NaOCl}+\mathrm{NaCl}+\mathrm{H}_{2} \mathrm{O}$

Chemistry

John E. Mcmurry,… 6th Edition

Chapter 3, Problem 38

Instant Answer

Solved by Expert Nadia Lara

04/23/2020

Step 1

Count the number of each atom on both sides of the equation. On the reactant side, we have 2 Ag, 2 Br, 2 Na, 4 O, and 6 H atoms. On the product side, we have 2 Ag, 2 Br, 2 Na, 3 O, and 2 H atoms. Show more…

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Which of the following equations are balanced? (a) The development reaction in silver-halide photography: $2 \mathrm{AgBr}+2 \mathrm{NaOH}+\mathrm{C}_{6} \mathrm{H}_{6} \mathrm{O}_{2} \longrightarrow$ $2 \mathrm{Ag}+\mathrm{H}_{2} \mathrm{O}+2 \mathrm{NaBr}+\mathrm{C}_{6} \mathrm{H}_{4} \mathrm{O}_{2}$ (b) The preparation of household bleach: $2 \mathrm{NaOH}+\mathrm{Cl}_{2} \longrightarrow \mathrm{NaOCl}+\mathrm{NaCl}+\mathrm{H}_{2} \mathrm{O}$

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Key Concepts

Law of Conservation of Mass

The law of conservation of mass is a principle stating that mass is neither created nor destroyed in a chemical reaction. This principle underlies the need to balance chemical equations because the total mass of the reactants must equal the total mass of the products.

Stoichiometry

Stoichiometry refers to the quantitative relationships between reactants and products in a chemical reaction. It involves using coefficients to indicate the proportions of substances involved, ensuring the balanced equation reflects the correct amount of each substance participating in and produced by the reaction.

Balancing Chemical Equations

This concept involves ensuring that the number of atoms for each element is equal on both sides of a chemical equation. It is a fundamental skill in chemistry that reflects the conservation of mass during a chemical reaction, ensuring that atoms are neither created nor destroyed but merely rearranged.

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