Question

Balance the following equation in acidic conditions.

Cr2+ + H2MoO4 --> Cr3+ Mo

Answer 1

To balance the equation, Hydrogen ion should be added to the left of the equation and water to the right of the equation as follows:


`H^(+) + Cr^(2+) + H_(2) Mo O_(4) ---\ \textgreater \ Cr^(3+) + Mo + H_(2) O`

Balancing the equation


`6 H^(+) + 6 Cr^(2+) + H_(2) Mo O_(4) ----\ \textgreater \ 6 Cr^(3+) + Mo + 4 H_(2) O`

It can be noted that: ions are balanced at 18+ on left hand side and 18+ on right and side just like all the other chemical elements.