Question

An element m forms oxide m2o3.What wil be the formula of its phosphate

Answer 1

The formula of the phosphate of an element m whose oxide is m₂O₃ is mPO₄.

• The formula of the oxide of an element m is m₂O₃, as we know that the valency of oxygen is -2, so we can conclude that the valency of 'm' will be +3.
• The formula of phosphate is PO₄⁻³.
• The formula of its phosphate can be written by the criss-cross method.

                  m             PO₄

                  +3              -3

   The formula is m₃(PO₄)₃, which is reduced to mPO₄

Hence, the formula of the phosphate of an element m whose oxide is m₂O₃ is mPO₄.

Answer 2

m⁴ po ³

m is combine with po

so, m³(po⁴)² is answer