Make up the molecular and ionic equations for the reactions of phosphoric acid: a) with calcium.
Make up the molecular and ionic equations for the reactions of phosphoric acid: a) with calcium. b) with calcium oxide. c) with calcium hydroxide taken in excess and deficiency. Place the names of the respective substances under the formulas.
a) 2H3PO4 + 3Ca -> Ca3 (PO4) 2 + 3H2
Phosphoric acid + calcium -> calcium orthophosphate + hydrogen.
Ionic: 6H + + 2PO43- + 3Ca -> Ca3 (PO4) 2 + 3H2
b) 3CaO + 2H3PO4 -> Ca3 (PO4) 2 + 3H2O
Calcium oxide + phosphoric acid -> calcium orthophosphate + water.
Ionic: 3CaO + 6H + + 2PO43- -> Ca3 (PO4) 2 + 3H2O
c) 1.2H3PO4 + 3Ca (OH) 2 -> Ca3 (PO4) 2 + 6H2O
Phosphoric acid + calcium hydroxide (excess) -> calcium orthophosphate + water.
Ionic: 6H + + 2PO43- + Ca2 + + 2OH- -> Ca3 (PO4) 2 + 6H2O
2.H3PO4 + Ca (OH) 2 -> CaHPO4 + 2H2O
Phosphoric acid + calcium hydroxide (deficiency) -> calcium hydrogen phosphate + water.
Full ionic: 3H + + PO43- + Ca2 + + 2OH- -> Ca2 + + HPO42- + 2H2O
Abbreviated ionic: 3H + + PO43- + 2OH- -> HPO42- + 2H2O
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