Question

The reaction of zinc (II) hydroxide with phosphoric acid produces zinc (II) phosphate and water.



Balance the reaction by completing the chemical equation with the molar coefficients.

Response area with 4 blank spaces

Blank space 1 empty
Blank space 2 empty
Blank space 3 empty
Blank space 4 empty
Answer options with 5 options.

Answer 1

To balance the reaction of zinc (II) hydroxide with phosphoric acid, we will first write the unbalanced equation:

\[
\text{Zn(OH)}_2 + \text{H}_3\text{PO}_4 \rightarrow \text{Zn}_3\text{(PO}_4\text{)}_2 + \text{H}_2\text{O}
\]

Now, to balance it out:

1. Zinc (Zn) from zinc hydroxide and zinc phosphate must be balanced.
2. Phosphate (PO₄) will appear as it needs to be balanced across both sides.
3. Water will need to be balanced once the other components are balanced.

Ultimately, the balanced equation is:

\[
3 \text{Zn(OH)}_2 + 2 \text{H}_3\text{PO}_4 \rightarrow \text{Zn}_3\text{(PO}_4\text{)}_2 + 6 \text{H}_2\text{O}
\]

Thus, the coefficients are:

- Blank space 1: 3
- Blank space 2: 2
- Blank space 3: 1
- Blank space 4: 6

So, the completed response area is:

- **Blank space 1**: 3
- **Blank space 2**: 2
- **Blank space 3**: 1
- **Blank space 4**: 6

You would select the appropriate numbers from your provided answer options to complete the balance.