1. Determined the oxidation number of the phosphorus, sulfur, and nitrogen in ea

Question

1. Determined the oxidation number of the phosphorus, sulfur, and nitrogen in each of the following compounds.

H2PO4-    SO32-    N2O4

2. Which of the following statements is true?

An oxidized species gains electrons.

A reducing agent gains electrons.

An oxidizing agent gains electrons.

All of the above are true.

3. What is the reducing agent in the following reaction?

Zn

MnO2

H2O

Zn(OH)­2

MnO(OH)

4. Which of the following is a redox reaction?

HBr (aq) + KOK (aq) à H2O (l) + KBr (aq)

SO3 (g) + H2O (l) à H2SO4 (aq)

HBr (aq) + Na2S (aq) à NaBr (aq) + H2S (g)

NH4+ (aq) + 2 O2 (g) à H2O (l) + NO3- (aq) + 2 H+ (aq)

None of the above

Explanation / Answer

1. Oxidation number:

H2PO4- = +5 for P

SO32- = +4 for S

N2O4 = +4 for N

2. True statement is:

An oxidizing agent gains electrons.

Related Questions

Navigate

• Browse (All)
• Browse 1
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.