Answer to Question #289036 in Chemistry for Theresa Stewart

Question

1) Determine the oxidation number of:

a)bromine in:bromine dioxide (BrO)² the BrO-³ and BrO-ion.

b)nitrogen in: ammonia (NH)³, the NO² ion and dinitrogen monoxide (N²O)

C)carbon in:carbon monoxide (CO) CO⅔ ion, methane (CH⁴), propene (C³H6) and the HCO³-ion

Answer 1

Solution:

(a):

1) bromine dioxide (BrO₂): Br⁺⁴; O⁻²

The oxidation number of Br in BrO₂ is +4.

2) BrO₃⁻ ion: Br⁺⁵; O⁻²

The oxidation number of Br in BrO₃⁻ ion is +5.

3) BrO⁻ ion: Br⁺¹; O⁻²

The oxidation number of Br in BrO⁻ ion is +1.

(b):

1) ammonia (NH₃): N⁻³; H⁺¹

The oxidation number of N in NH₃ is −3.

2) NO₂⁻ ion: N⁺³; O⁻²

The oxidation number of N in NO₂⁻ ion is +3.

3) dinitrogen monoxide (N₂O): N⁺¹; O⁻²

The oxidation number of N in N₂O is +1.

(c):

1) carbon monoxide (CO): C⁺²; O⁻²

The oxidation number of C in CO is +2.

2) CO₃²⁻ ion: C⁺⁴; O⁻²

The oxidation number of C in CO₃²⁻ ion is +4.

3) methane (CH₄): C⁻⁴; H⁺¹

The oxidation number of C in CH₄ is −4.

4) propene (C₃H₆): C⁻²; H⁺¹

The oxidation number of C in C₃H₆ is −2.

5) HCO₃⁻ ion: H⁺¹; C⁺⁴; O⁻²

The oxidation number of C in HCO₃⁻ ion is +4.