Answer:
1. Balanced
2. Unbalanced
3. Unbalanced
Explanation:
Identify which of the following oxidation-reduction reactions are balanced and which are unbalanced in both mass and charge.
1. Ag⁺(aq) + Li(s) → Ag(s) + Li⁺(aq)
This reaction is balanced in both mass and charge.
2. Fe(s) + Na⁺(aq) → Fe²⁺(aq) + Na(s)
This reaction is balanced in mass but unbalanced in charge since the charge to the left is +1 and the charge to the right is 2+.
3. K(s) + H₂O(l) → KOH(aq) + H₂(g)
This reaction is balanced in charge but unbalanced in mass since there are 2 atoms of H to the left and 3 atoms of H to the right.