Question

The reaction 2k(s) + br2(l) → 2kbr(s) is a(n) ______________ reaction.

Answer 1

The correct answer is oxidation-reduction.

Step-by-step explanation:

This reduction-oxidation reaction is given by the following semi-reactions:

`Br_(2)` + 2
`e^(-)` → 2
`Br^(-1)` (reduction)

2
`K^(0)` - 2
`e^(-)` → 2
`K^(1)` (oxidation)

`Br_(2)` is an oxidation agent, K is a reducing agent.

This means that
`Br_(2)` oxidizes K by increasing its oxidation number from 0 to 1.

`Br_(2)` is reduced, decreasing its oxidation number from 0 to -1.

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