1. Suppose that substances A2, B2, and C2 are all oxidizing agents. You are give
ID: 1005105 • Letter: 1
Question
1. Suppose that substances A2, B2, and C2 are all oxidizing agents. You are given the following facts: (In solution: A2 is green, B2 is yellow, C2 is red)...
The three substances undergo reactions in which they are reduced to A-, B-, and C- ions. The three anions, A-, B-, and C- are all colorless in aqueous solution. When a solution of C2 is mixed with a solution containing A- ions, the color changes from red to green.
a) Determine which substance is oxidized (Explain your reasoning)
b) Determine which substance is reduced
c) Is C2 a better oxidizing agent than A2? (Explain your reasoning)
2. When a solution of C2 is mixed with a solution containing B- ions, the color remains red.
Is C2 a better oxidizing agent than B2? (Explain your reasoning).
3. Arrange A2, B2, and C2 in order of increasing strengths as oxidizing agents.
Explanation / Answer
The reaction can be wriiten as:
C2 (red) + A- (colorless) --------- C- (colorless) + A2 (green)
a) C2 gets reduced
b) A- gets oxidised
2) Given reaction: C2 (red) + B- (colorless) --------- color remains red, hence no reaction
- Since C2 doen not get reduced to C- in the above reaction, it is a weaker oxidising agen than B. But since it gets reduced with A-, it is a stronger oxidising agent that A.
3) A<C<B
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