Question

when potassium iodide liquid is poured into lead nitrate solution (both clear solutions), a bright yellow solid, lead iodide, forms in a potassium nitrate solution. what are the signs that this is a chemical reaction? check all that apply.
□ heat is produced.
□ light is produced.
□ heat is absorbed.
□ bubbles appear.
□ a precipitate forms.
□ the color changes.

Explanation:

A chemical reaction often shows signs such as formation of a precipitate, color - change. In this case, a bright yellow solid (precipitate) lead iodide forms from clear solutions, and there is a color change. There is no information suggesting heat production/absorption, light production or bubble formation.

Answer:

A precipitate forms.
The color changes.