Question

enter the formula for the compound that forms from calcium and hydroxide. express your answer as a chemical formula.

Explanation:

Step1: Determine ion charges

Calcium (Ca) forms \( \text{Ca}^{2+} \) ion. Hydroxide is \( \text{OH}^- \) ion.

Step2: Balance charges

To balance \( 2+ \) and \( 1- \), we need 2 \( \text{OH}^- \) for 1 \( \text{Ca}^{2+} \).

Step3: Write formula

Combine ions: \( \text{Ca}(\text{OH})_2 \).

Answer:

\( \text{Ca(OH)}_2 \)