Question

write formulas for the compounds formed from in and each of the following polyatomic ions: $\ce{clo4^{-}}$, $\ce{so4^{2-}}$, $\ce{po4^{3-}}$. (assume in charge is 3+.) express your answers as chemical formulas separated by commas.

Explanation:

Step1: Determine formula for \(In\) and \(ClO_4^-\)

The charge on \(In\) is \(3+\) and on \(ClO_4^-\) is \(1-\). To balance the charges, we need 3 \(ClO_4^-\) ions for 1 \(In^{3+}\) ion. So the formula is \(In(ClO_4)_3\).

Step2: Determine formula for \(In\) and \(SO_4^{2 -}\)

The charge on \(In\) is \(3+\) and on \(SO_4^{2 -}\) is \(2-\). Using the cross - multiply method (swap the magnitudes of the charges), we get \(In_2(SO_4)_3\).

Step3: Determine formula for \(In\) and \(PO_4^{3 -}\)

The charge on \(In\) is \(3+\) and on \(PO_4^{3 -}\) is \(3-\). The ratio of \(In^{3+}\) to \(PO_4^{3 -}\) is \(1:1\), so the formula is \(InPO_4\).

Answer:

\(In(ClO_4)_3,In_2(SO_4)_3,InPO_4\)