Question

Write the chemical formula for:

Zinc phosphate

Answer 1

• The chemical formula of Zinc phosphate $\left[{\mathrm{Zn}}_3{\left({\mathrm{PO}}_4\right)}_2\right]$:
• Step-1: Write the chemical symbol of the cation and anion.
• Here cation is Zinc i.e; $\mathrm{Zn}$
• And anion or acidic radical is Phosphate i.e.; ${\mathrm{PO}}_4$
• Step-2: Write the valency or charges of the cation and anion below their symbols
• $$\begin{gathered} \mathrm{Symbol}\mathrm{Zn}{\mathrm{PO}}_4 \\ \mathrm{Valency}23 \end{gathered}$$
• Step-3: Transpose the valency of the cation with anion and vice versa using the criss-cross method
• Valency: Valency is the combining capacity of an atom of the element.
• $$\begin{gathered} \mathrm{Symbol}\mathrm{Zn}{\mathrm{PO}}_4 \\ \searrow \swarrow \\ \mathrm{Valency}23 \end{gathered}$$
• Step-4: Write the formula
• $\left[{\mathrm{Zn}}_3{\left({\mathrm{PO}}_4\right)}_2\right]$