Let’s write down the reaction equations for the next chain of compounds. It turns out the following.
4P + 5O2 = 2P2O5.
Compound reaction or combustion reaction. When phosphorus interacts with oxygen, the result is phosphorus oxide.
P2O5 + 3H2O = 2H3PO4.
Compound reaction. When phosphorus oxide and water interact, the result is phosphoric acid.
2Н3РО4 + 3ZnCl2 = Zn3 (PO4) 2 + 6HCl.
Exchange reaction. When phosphoric acid and zinc chloride interact, the result is zinc phosphate and hydrochloric acid.
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