Complete and balance the perception reactions. include physical states. k3po4(aq)+mgcl2(an)

Compounds K3PO4  and MgCl2  are soluble in water , as phosphates of alkali metal cations are soluble in water and chlorides  Of Mg²⁺ are soluble in water . So , they dissociate into ions.

Ions K⁺ and  Cl⁻ combine to form  KCl  , soluble compound.

Ions PO₄³⁻  and Mg²⁺ combine to  form Mg3(PO4)2 ,  a precipitate  as phosfates of Mg²⁺ are insoluble  in water

Thus , the balanced equation , is:

2 K3PO4(aq) + 3  MgCl2(aq ) >  6 KCl(aq)  + Mg(PO4)2(s)

1. for the first question, we must find the mass of the anhydrous salt, mgso₄. the molar mass for mgso₄·7h₂o is 246.47 g/mol, while that of mgso₄ is 120.37 g/mol.7.834 g mgso₄·7h₂o * 1 mol mgso₄·7h₂o/246.47 g * 1 mol mgso₄/1 mol mgso₄·7h₂o * 20.37 g mgso₄/mol = 0.647 g mgso₄

2. mass of water = mass of sample - mass of anhydrous salemass of water = 7.834 - 0.647 = 7.19 gpercent water in hydrate = 7.19/7.834 * 100 = 91.74%