Question

If the formula of a chloride of a metal $M$ is $M{Cl}_3$, then what will be the formula of the phosphate of metal $M$?

• A. $MP{O}_4$
• B. $M_{2}P{O}_4$
• C. $M_{3}P{O}_4$
• D. $M_2{\left(P{O}_4\right)}_3$

Answer 1

The correct option is A $MP{O}_4$

If the formula of a chloride of a metal $M$ is $M{Cl}_3$, then the formula of the phosphate of metal $M$ will be $MP{O}_4$.

Since, the formula of a chloride of a metal $M$ is $M{Cl}_3$, the metal is trivalent (because chlorine is monovalent). Phosphate is trivalent. Hence, one $M^{3+}$ ion will combine with one $P{O}_4^{3-}$ ion to maintain electrical neutrality.