Question

Which of the following reactions is balanced?

Question 13 options:

A)

Sn2+ + 2Fe3+ → Sn4+ + Fe2+

B)

Sn2+ + 2Fe3+ → Sn4+ + 2Fe2+

C)

Sn2+ + Fe3+ → Sn4+ + Fe2+

D)

2Sn2+ + Fe3+ → 2Sn4+ + Fe2+

Answer 1

The balanced chemical reaction equation among all the options is:

`Sn^(2+) + 2Fe^(3+)` →
`Sn^(4+) + Fe^(2+)` (Option A is correct)

Why is this the correct option?

A chemical equation must be balanced so that the total mass on the reactant and product sides are equal. This is required by the law of conservation of mass. The positive charge on the reactant side and the positive charge on the product side should match up in the provided equation.

The
`Sn^(2+)` ions' two lost electrons are changed into
`Sn^(4+)` ions. Two
`Fe^(3+)` ions take these two electrons and change into
`Fe^(2+)` ions.