Chemistry Forum

Goodday!!

Currently, I' ve seen on this site that it is
2 Na₂HPO₄ + 3 CaCl₂ = Ca₃(PO₄)₂ + 4 NaCl + 2 HCl.

I was wondering if (a) I use Na₂HPO₄.2H₂O (dihydrate Na₂HPO₄) how the stoichiometry would be
and (b) in hydrated compounds as the above, does the H₂O part play any role in the way each corresponding reaction is carried on? or do we just ignore the H₂O molecules?

best regards!!

You have aqueous solutions. The crystal water of the hydrogen phosphate is already dissolved and the stoichiometry is the same.

Thank you very much for your answer!