Question

A chemistry student adds an excess of calcium nitrate solution to a solution of sodium phosphate. After the precipitate has settled and was filtered, the filtrate will contain:

a. Sodium ions and nitrate ions.
b. Calcium ions and phosphate ions.
c. Sodium ions and phosphate ions.
d. Calcium ions and nitrate ions.

Answer 1

The filtrate will contain calcium ions and phosphate ions.

Step-by-step explanation:

b. Calcium ions and phosphate ions.

When an aqueous solution of calcium nitrate is added to a solution of sodium phosphate, a double displacement reaction occurs. The calcium ions and phosphate ions will combine to form a precipitate of calcium phosphate, which settles down and can be filtered out. The remaining filtrate will contain sodium ions from sodium phosphate and nitrate ions from calcium nitrate.