Q700
Rock phosphate has chemical composition
A.
(CaO)3, P2O5
B.
Ca3(PO4)2
AnswerC.
Ca3PO4
D.
CaCO3
Answer: Option B
Solution
Answer: Option B
Solution:
Rock phosphate has a chemical composition Ca3(PO4)2.It is a calcium salt of phosphoric acid with the chemical formula Ca3(PO4)2. It is also known as tribasic calcium phosphate (TCP) and bone phosphate of lime (BPL).
The molar mass of the compound is 310.18, and appears as a white amorphous powder with low solubility.
It exists as three crystalline polymorphs α, α′, and β. The α and α′ states are stable at high temperatures.