Question

Balance the following chemical equation:

• PO4 + H2SO4 ----> H3PO4 + H2O + SO2

• PO3 + H2SO4 ----> H3PO4 + H2O + SO2

Answer 1

Hello Sista !!!

This is your answer.

$PO_{4} + H_{2}SO_{4} --> H_{3}PO_{4}+ H_{2}O + SO_{2}$

Reordering it...
$H_{2}SO_{4} +H_{3}PO_{4}--> PO_{4} + H_{2}O + SO_{2}$

Using Hit and Trial method ;
$H_{2}SO_{4} +H_{3}PO_{4}--> PO_{4} + H_{2}O + SO_{2}$
$3H_{2}SO_{4} +2H_{3}PO_{4}--> 2PO_{4} + 6 H_{2}O + 3SO_{2}$

Best Balancing :
$-2 PO_{4} +2 H_{2}SO_{4} --> -2H_{3}PO_{4}+6 H_{2}O + 3SO_{2}$

Here, minus (-) Symbol means we have to reorder it.

Hope It Helps