What is the formula for the compound composed of calcium and phosphate?

Answer 1

#CaHPO_4# or #Ca_3(PO_4)_2#

Calcium phosphates are a very broad church. I just read that the mineral apatite, which is the phosphate we put on our gardens as fertilizer is #Ca_5(PO_4)_3X# #(X=X^(-), HO^-)#.

Of course the phosphate ion, #PO_4^(3-)# is quite a strong base, and in aqueous solution exists as #HPO_4^(2-)#.

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Answer 2

Luna Chen

The compound made up of phosphate and calcium has the formula Ca3(PO4)2.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

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