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Chapter 8: Problem 80

Indicate which bonds are broken and which are formed when each reaction occurs: (a) \(\mathrm{N}_{2}+3 \mathrm{Br}_{2} \rightarrow 2 \mathrm{NBr}_{3}\) (b) \(\mathrm{P}_{4}+6 \mathrm{H}_{2} \rightarrow 4 \mathrm{PH}_{3}\) (c) \(\mathrm{KF}+\mathrm{NaI} \rightarrow \mathrm{KI}+\mathrm{NaF}\) (d) \(\mathrm{CH}_{4}+\mathrm{Cl}_{2} \rightarrow \mathrm{CH}_{3} \mathrm{Cl}+\mathrm{HCl}\)

Short Answer

Expert verified
(a) Broken: 1 N-N triple bond, 3 Br-Br single bonds. Formed: 6 N-Br single bonds. (b) Broken: 6 P-P single bonds, 6 H-H single bonds. Formed: 12 P-H single bonds. (c) Broken: 1 K-F ionic bond, 1 Na-I ionic bond. Formed: 1 K-I ionic bond, 1 Na-F ionic bond. (d) Broken: 1 C-H single bond, 1 Cl-Cl single bond. Formed: 1 C-Cl single bond, 1 H-Cl single bond.

Step by step solution

01

Identify reactants and products

The reactants in this reaction are N₂ and Br₂, and the product is NBr₃.
02

Determine broken bonds

The N - N triple bond in N₂ and three Br - Br single bonds in Br₂ are broken.
03

Determine formed bonds

Six N - Br single bonds are formed in the two NBr₃ molecules. (b) \(\mathrm{P}_{4}+6 \mathrm{H}_{2} \rightarrow 4 \mathrm{PH}_{3}\)
04

Identify reactants and products

The reactants in this reaction are P₄ and H₂, and the product is PH₃.
05

Determine broken bonds

Six P - P single bonds in P₄ and six H - H single bonds in H₂ are broken.
06

Determine formed bonds

Twelve P - H single bonds are formed in the four PH₃ molecules. (c) \(\mathrm{KF}+\mathrm{NaI} \rightarrow \mathrm{KI}+\mathrm{NaF}\)
07

Identify reactants and products

The reactants in this reaction are KF and NaI, and the products are KI and NaF.
08

Determine broken bonds

One K - F ionic bond in KF and one Na - I ionic bond in NaI are broken.
09

Determine formed bonds

One K - I ionic bond in KI and one Na - F ionic bond in NaF are formed. (d) \(\mathrm{CH}_{4}+\mathrm{Cl}_{2} \rightarrow \mathrm{CH}_{3} \mathrm{Cl}+\mathrm{HCl}\)
10

Identify reactants and products

The reactants in this reaction are CH₄ and Cl₂, and the products are CH₃Cl and HCl.
11

Determine broken bonds

One C - H single bond in CH₄ and one Cl - Cl single bond in Cl₂ are broken.
12

Determine formed bonds

One C - Cl single bond in CH₃Cl and one H - Cl single bond in HCl are formed.

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Most popular questions from this chapter

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