Gallium with acids producing [Ga[H2O]6]3+ ion

I'm not sure, because I'm not very knowledgeable.. but I would say 2 Ga³⁺ and 3 SO₄^2-

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So, you suggest that the ions H₃O⁺ and Ga³⁺ together make the gigantic [Ga(H₂O)₆]³⁺ ?

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So, you suggest that the ions H₃O⁺ and Ga³⁺ together make the gigantic [Ga(H₂O)₆]³⁺ ?

Why H₃O⁺? Ga³⁺ has already required charge.

But there was H₃O⁺ written over the line in the exercise, so I assumed I have to do something with it.

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So, the ion with 6 molecules of water is the same kind of a compound as for example the hydrate Na2CO3•10H2O ?

Gallium with a strong acid, so that the product was [Ga(H₂O)₆]³⁺. I believe this is what the task is about.

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I would say 2 Ga³⁺

OK.

Have you heard about solvation? Hydration? Do you know that no cation stays alone in water solution?

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So, you suggest that the ions H₃O⁺ and Ga³⁺ together make the gigantic [Ga(H₂O)₆]³⁺ ?

Why H₃O⁺? Ga³⁺ has already required charge.

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depict this reaction

Be careful here - which reaction?

So, there is just no way to depict this reaction with a full equation, I mean with particular reagents? It must remain in the ionic form? An example with for example sulfuric acid can't be done?

And what does Ga₂(SO₄)₃ dissociate to when dissolved?

Quote from Bielański means just that the reaction is

Ga + H⁺ + H₂O Ga(H₂O)₆³⁺ + H₂

(unbalanced, but that's just a trivial exercise).

It is not exactly the same as in sodium carbonate decahydrate, as the decahydrate is a solid, while we are talking about Ga³⁺(aq). But to some extent these are related things.

If you want ionic product, for consistency you should write the net ionic reaction. If so, you should not list H₂SO₄ as a reactant, but H⁺.