1. Determined the oxidation number of the phosphorus, sulfur, and nitrogen in ea
ID: 969732 • Letter: 1
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.
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