1. The formula of the hydrate is FePO₄•4H₂O
2. The name of the hydrate is Iron(iii) phosphate tetrahydrate.
1. Determination of the formula of the hydrate
- H₂O = 32.3%
- FePO₄ = 67.7%
- Formula =?
The formula of the hydrate can be obtained as follow:
Divide by their molar mass
H₂O = 32.3 / 18 = 1.794
FePO₄ = 67.7 / 151 = 0.448
Divide by the smallest
H₂O = 1.794 / 0.448 = 4
FePO₄ = 0.448 / 0.448 = 1
Therefore, the formula of the hydrate is FePO₄•4H₂O
The name of the hydrate is Iron(iii) phosphate tetrahydrate
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