Using the following portion of the activity series for oxidation half reactions
k(s) → k+ (aq) + e-
al(s) → al3+ (aq) + 3e-
fe(s) → fe2+ (aq) + 2e-
sn(s) → sn2+ (aq) + 2e-
determine which reaction will occur.
a) al3+(aq) with fe(s)
b) al(s) with sn(s)
c) k+(aq) with fe2+(aq)
d) k(s) with sn2+(aq)

Reaction D) K(s) with Sn2+(aq) will occur

Explanation:

Considering the activity series and the list of elements in order of their reactivity, K(s) is the most reactive and Sn2+(aq) is the least reactive.

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