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QUESTION

# What is the chemical equation for calcium + phosphorus ---&gt; calcium phosphide?

Calcium + Phosphorous to produce Calcium Phosphide is an ionic synthesis reaction.

Calcium has a charge of Ca^(+2).Phosphorous has a charge of P^-3. To bond these two ions together, their charges must be equal and opposite. Therefore we need 3 Ca^(+2) ions to balance with 2 P^-3 in order to balance their charges at 6 for the molecule Ca_3P_2.

3Ca + 2P -> Ca_3P_2

I hope this was helpful. SMARTERTEACHER