An iron (III) sulfate is 18.4% water. What is the formula of the hydrate? What is the name of the hydrate?
a) Fe₂(SO₄)₃ • 9H₂O, Iron(III) Nonahydrate
b) Fe(SO₄)₃ • 7H₂O, Iron(III) Heptahydrate
c) Fe₂(SO₄)₃ • 5H₂O, Iron(III) Pentahydrate
d) Fe₂(SO₄)₃ • 3H₂O, Iron(III) Trihydrate
