1. If a metal begins with a +3 charge, which of the following charges would indi

Question

1. If a metal begins with a +3 charge, which of the following charges would indicate that the metal has been oxidized?

2. 2Li(s)+F2(g)?2LiF(s)

3. Cl2(g)+2KI(aq)?2KCl(aq)+I2(s)

4. Mg(s)+Cu2+(aq)?Mg2+(aq)+Cu(s)

5. Fe(s)+CuSO4(aq)?FeSO4(aq)+Cu(s)

6. Hydrogenation is used to convert alkenes and alkynes to alkanes.

Indicate whether each of the following is an oxidation or a reduction reaction:

7. O2(g)+4e??2O2?(aq)

8. Al(s)?Al3+(aq)+3e?

9. Fe3+(aq)+e??Fe2+(aq)

10. Br?(aq)?Br2(g)+2e?

11. The balanced equation for the complete combustion of C5H12 will give which of these product(s)?

Thank you all:)

Explanation / Answer

1. When a metal is oxidized, it means it loses the electrons. So, if the metal is 3+ , means that the metal is at a loss of 3 electrons from its normal / original electronic configuration. It will be oxidized if more of electrons are removed to produced charge of higher than 3. In the options, higher than 3 is +4.

So, metal3+ loses 1 electron to get oxidized to achieve 4+ state.

The answer is +4

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