Question

Identify the half reaction as oxidation or reduction.

Sn ---> Sn2+ + 2e¯
Cl2 + 2e¯ ---> 2Cl¯

Answer 1

OILRIG:
Oxidation is loss (of electrons)
Reduction is gain (of electrons)
so...
The first one is an oxidation half-equation as the Sn loses electrons;
The second one is a reduction half-equation as the Cl₂ gains electrons