write and balance the equation?

Question

sodium phosphate reacts with calcium nitrate to produce sodium nitrate plus calcium phosphate

Answer 1

2Na3PO4 + 3Ca(NO3)2 ----> Ca3(PO4)2 + 6NaNO3

Answer 2

Good way to solve these easy problems are to first try to write out an unbalanced equation.

Sodium Phospahte - to write its formula first you look at Sodium (Na+) which has one positive charge. This suggest that it can give away only one electron to be stable. Phosphate (PO4^(3-)) which has three negative charge. This suggest that it needs three electron to be stable. Thus formula for sodium phosphate would be Na3PO4 which means that three Na would give away three electron to PO4 which would take those three electron. Thus both Na and PO4 would now be stable.

Same way you write formula for others and you come up with-

Reactant--> product

Na3PO4 + Ca(NO3)2 --> NaNO3 + Ca3(PO4)2

now to balance them you look at each individual element. Try to make element in reactant = element in product. This might be little tricky for you, but if you spent some time just doing by yourself you would have gotten the same result.

2Na3PO4 + 3Ca(NO3)2 --> 6NaNO3 + Ca3(PO4)2

Answer 3

2Na3PO4+ 3Ca(NO3)2--->6 NaNO3 + Ca3(PO4)2