In the reaction 2Cr2O7^2- + 14H+ + 6e^- → 4Cr^3+ + 7H2O, what is the role of Cr2

Practice Questions

Q1
In the reaction 2Cr2O7^2- + 14H+ + 6e^- → 4Cr^3+ + 7H2O, what is the role of Cr2O7^2-?
  1. Oxidizing agent
  2. Reducing agent
  3. Neutral agent
  4. None of the above

Questions & Step-by-Step Solutions

In the reaction 2Cr2O7^2- + 14H+ + 6e^- → 4Cr^3+ + 7H2O, what is the role of Cr2O7^2-?
  • Step 1: Identify the reactants in the reaction. Here, we have Cr2O7^2-, H+, and e^-.
  • Step 2: Look at what happens to Cr2O7^2- in the reaction. It changes to Cr^3+.
  • Step 3: Understand the meaning of 'reduced'. When a substance gains electrons, it is reduced.
  • Step 4: Notice that Cr2O7^2- gains electrons (6e^-) in the reaction.
  • Step 5: Since Cr2O7^2- is gaining electrons, it is being reduced.
  • Step 6: Identify the role of a substance that is reduced in a reaction. It is called an oxidizing agent.
  • Step 7: Conclude that Cr2O7^2- is the oxidizing agent because it is reduced to Cr^3+.
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