Verified answer

AgH2PO4=silver dihydrogen phosphate

Mg(H2PO4)2=magnesium dihydrogen phosphate

H2PO4^- is the dihydrogen phosphate ion.

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RE:

what is AgH2PO4 and Mg(H2PO4)2?

AgH2PO4 would be silver(I) dihydrogen phosphate. Zinc has a +2 charge, whereas dihydrogen phosphate has a charge of -1. To balance, it would be Zn(H2PO4)2

Silver dihydrogen phosphate

magnesium dihydrogen phosphate