Question

now that h₂o was used to balance out the oxygen on the product side, hydrogen now needs to be balanced on the reactant side. how many h⁺ should be added to the reactant side? ?h⁺ + mno₄⁻ → mno₂ + 2h₂o

Explanation:

Step1: Analyze hydrogen atoms in products

The product side has \(2\text{H}_2\text{O}\), so the number of H atoms is \(2\times2 = 4\) (since each \(\text{H}_2\text{O}\) has 2 H atoms).

Step2: Determine \( \text{H}^+ \) needed

To balance hydrogen, the number of \( \text{H}^+ \) on the reactant side should equal the number of H atoms on the product side. Since each \( \text{H}^+ \) provides 1 H atom, we need 4 \( \text{H}^+ \) to balance the 4 H atoms from \(2\text{H}_2\text{O}\).

Answer:

4