Calcium superphosphate is made from calcium phosphate which contain the ions ca2+ and Po3-. Write its formula
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Answer: Ca(H2PO4)2
Explanation:
Calcium superphosphate, Ca(H2PO4)2 is obtained by treating calcium phosphate by either phosphoric acid, H3PO4 or a mixture of of sulphuric acid and phosphoric acid.
In order to write the correct chemical symbol for calcium superphosphate, a great understanding of the valency is required.
For instance, Ca has a valency of 2 while H2PO4^- is a radical with valency of 1. Therefore when the two combine chemically, they interchange their valencies as illustrated below:
Ca^2+ H2PO4^-
Interchanging the valency gives: Ca(H2PO4)2 which is calcium superphosphate
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