Question

HCIO4 (1) + P2O5(s) —-> Cl₂O7 (l)+ HPO3(s) Balance it

Answer 1

First we balance the metals P:phosphorus

$\text{ HClO}_4\text{ + P}_2\text{O}_5\text{ }\rightarrow\text{ Cl}_2\text{O}_7\text{ + 2HPO}_3$

then we balance the non-metals Cl:chlorine

$\text{ 2HClO}_4\text{ + P}_2\text{O}_5\text{ }\rightarrow\text{ Cl}_2\text{O}_7\text{ + 2HPO}_3$

Then we balance the hydrogens and oxygens

If we look at the hydrogens and oxygens they are already balanced because there are 2 hydrogens in the reactants and 2 hydrogens in the products. Similarly, There are 13 oxygens in the reactants and 13 oxygens in the products.

The answer is:

$2\text{ HClO}_4\text{ + P}_2\text{O}_5\text{ }\rightarrow\text{ Cl}_2\text{O}_7\text{ + 2HPO}_3$