ReDox Work Sheet

1. Determine the oxidation number for manganese in each of the following:

(a) KMnO₄

(b) LiMnO₂

(c) MnO₂

(d) K₂MnCl₄

(e) Mn₂O₇

2. Balance the following redox reactions:

(a) ClO₃¯ + SO₂ - à SO₄²¯ + Cl¯

(b) H₂S + NO₃¯ à S₈ + NO

(c) MnO₄¯ + H₂S à Mn²⁺ + S₈

(d) Cu + SO₄²¯ à Cu²⁺ + SO₂

(e) MnO₄¯ + CH₃OH à CH₃COOH + Mn²⁺

(f) Cr₂O₇²¯ + Fe²⁺ à Cr³⁺ + Fe³⁺

(g) HNO₂ à NO + NO₂

(h) H₂C₂O₄ + MnO₄¯ à CO₂ + Mn²⁺

(i) O₂ + As à HAsO₂ + H₂O

(j) NO₂ à NO₃¯ + NO

3. Solve the following problems:

(a) What volume of 6M nitric acid is required to dissolve 3.26 g of copper?

(b) What mass of carbon would be required to reduce 250 gr of iron (III) oxide to iron metal assuming that all of the carbon gets oxidized to carbon dioxide?