Answer to Question #90020 in Chemistry for Vaibhavi Desai

Question

(a) What is the oxidation number of the named element in the foilowing compounds?

(i) manganese in Mn2O^7

(ii) iron in Fe(CN6)^3-

(b) Use the oxidation number method to balance the equation below.

MnO4-(aq) + H+ (aq) + Fe^2+ (aq) = +Mn^2+ (aq) + Fe^3+ (aq) + H20 (I)

Which element was oxidized and which was reduced?

Oxidized:
Reduced:

(c) in the reaction between iodine and thiosulphate ions, the two half reactions are

I2 + 2e- = 2I-

2S2O3^2- = S4O6^2- + 2e-

Use the half equation above to write a single balanced equation, Step by step.

Answer 1

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