Question

enter the formula for the compound that forms from calcium and hydrogen phosphate. express your answer as a chemical formula. a chemical reaction does not occur for this question.

Explanation:

Step1: Determine the charges of the ions

Calcium ion (\(Ca^{2+}\)) has a charge of \(+2\). Hydrogen phosphate ion (\(HPO_{4}^{2 -}\)) has a charge of \(-2\).

Step2: Use the criss - cross method

The charges of the ions are \(+2\) and \(-2\). When using the criss - cross method (where the magnitude of the charge of one ion becomes the subscript of the other ion), \(\frac{Ca^{2+}}{HPO_{4}^{2 -}}\), the \(2\) from \(Ca^{2+}\) and the \(2\) from \(HPO_{4}^{2 -}\) cancel each other out.

Answer:

\(CaHPO_{4}\)