Question

How do you balance the following equation: `Ag + H_2S → Ag_2S + H_2`?

Answer 1

Put a coefficient of `2` in the first `Ag`.

Explanation:

Your equation is:

`Ag(s)+H_2S(aq)->Ag_2S(aq)+H_2(g)uarr`

This is a common reaction between an acid and metal, where it produces a salt and hydrogen gas.

From here, I see that everything is balanced, except that there are two silver atoms on the right side, but only one on the left side, so we multiply `Ag` on the left by `2` to get the balanced equation:

`2Ag(s)+H_2S(aq)->Ag_2S(aq)+H_2(g)uarr`