Calculate the formula for the following hydrate composed of 76.9% CaSO3 and 23.1% H2O.
CaSO3 H20
O CaSO3 • 2H20
CaSO3 • 3H20

CaSO₃·2H₂O

Explanation:

Empirically => CaSO₃·nH₂O

%H₂O = n(H₂O)/f.wt. x 100%

23.1% = n(H₂O)100/Ca + S +3O + nH₂O

23.1 = n(18)·100/[40 + 32 + 3(16) + n(18)]

1800n = 23.1[40 + 32 + 3(16) + n(18)]

1800n = 924 + 739.2 + 1108.8 + 415.8n

1800n - 415.8n = 924 + 739.2 + 1108.8

1385n = 2772

n = 2772/1385 = 2

∴ numerical formula => CaSO₃·2H₂O

solute : a solute is a substance that is dissolved in another substance is known as a solvent. it is mixed with a special mixture know as homogeneous mixture.

solvent: a solvent is a substance that dissolved a solute, which results in a solution is known as solvent.