Question

Write the name of the compound Stannic phosphate.

Answer 1

The symbol of Stannic is ‘$\mathrm{Sn}$’, having a valency of 4⁺.

The formula of phosphate is ‘${{\mathrm{PO}}_4}^{3-}$’ with valency 3^-.

Step 1 –

Write the formula of Stannic phosphate:

Symbol Valency

Stannic $\mathrm{Sn}$ 4⁺

Phosphate ${\mathrm{PO}}_4$ 3^-

Step 2 –

Write each symbol with its valency:

${\mathrm{Sn}}^{4+}$ ${{\mathrm{PO}}_4}^{3-}$

Step 3 –

Interchanging the valencies:

$$\begin{gathered} \mathrm{Sn}{\mathrm{PO}}_4 \\ \searrow \swarrow \\ {4}^{+}{3}^{-} \end{gathered}$$

The formula of the compound stannic phosphate would be${\mathrm{Sn}}_3{\left({\mathrm{PO}}_4\right)}_4$.