[Marysia29]

Hello
I need help with stoichiometric coefficients.
I attached a task with a reaction.

When I did this task myself, I completed the stoichiometric coefficients differently:
Ga + H3O⁺ + 5H20 --> [Ga(H20)6]³⁺ + 1/2 H2. I can also multiply everything by two to remove the fraction on the hydrogen.

Is my solution also correct??

[Borek]

Is the charge conserved in your equation?

[Marysia29]

I think I understand now.

In my equation on the left side I have 1+ and on the right side I have 3+. So, I have to use 3H3O⁺ and the charge will be conserved in equation, am I right?

[Borek]

Yes, in the balanced reaction equation charge must be conserved just like mass (atoms) is. Mass (atoms) can't appear from nowhere, charge can't as well. There is a slight difference as there are no negative atoms, while charge can be both negative and positive, but what matters is that total charge doesn't change.