A student observed a precipitate form during a chemical reaction. Which of the following did the student most likely observe? A. Bubbles of gas floated to the top of a solution. B. The color of a liquid changed when a solid was added to it. C. Steam rose from a flask when a powder was added to a liquid. D. A solid sank to the bottom of a container when two liquids were mixed.

Learning goal 1: Identify the statement that best describes a precipitate. A gas produced by a chemical reactionA solid formed by a composition reactionA cloudy solutionA solid that settles out of a solution

When a substance is added to water, bubbles form. How can you confirm the type of change that took place?A.The formation of bubbles is confirmation that a physical change took place.B.Determining that the gas produced in the reaction was different from the original substance would confirm that a chemical change took place.C.The formation of bubbles is confirmation that a chemical change took place.D.Showing that the total mass of the reactants equaled the total mass of the products would confirm that a physical change took place.

What chemical reaction results in the formation of a solid? A. acid base reaction B. endothermic C. precipitate

A student observes several reactions. Describe one observation the student might make that would indicate a chemical reaction has taken place.

Write the chemical equation of the reaction with an example each in which the following change has taken place:(i) Change in colour(ii) Change in temperature (iii) Formation of precipitate.