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In a lab, silver nitrate,AgNO3, is dissolved in water until no solid is observed in the container. Then, a solution of sodium chloride, NaCl, is added to the container. When you combine these aqueous solutions, there is no noticeable change in temperature; however, a solid precipitates and there is a slight change of color. Which statements about the lab experiment involving silver nitrate and a sodium chloride solution are true?

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Answer:

Formation of a solid indicates a chemical reaction occurred.

True

Explanation:

A chemical reaction is said to have occurred when a new substance(s) is (are) formed.

When we mix the sodium nitrate and sodium chloride, the following chemical reaction occurs;

2AgNO3(aq) + 2NaCl(aq) ------> 2AgCl(s) + 2NaNO3(aq)

The appearance of a solid shows that a chemical reaction has occurred and that NaCl really reacted chemically with AgNO3.