Lab: Types of Reactions Answers

In this experiment, you made observations of the ✔ reactantstype of reactiontemperature

and the balanced equationconcentration✔ products .

You used these observations to write the ✔ balanced chemical equationconcentrationsstates of matter

and ✔ classify the reactiondetermine the yield make more products.

What signs of a chemical reaction did you observe during the lab? Check all that apply.

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Which of the following best explains why you put KI and Pb(NO3)2 into two separate test tubes before mixing them?

Which of the following best explains why you sanded the copper wire before burning it?

When you burned copper, the product copper oxide appeared on the wire. Besides copper, the other reactant is .

Explain how you know it must be oxygen. Where did the oxygen come from?

Select all steps below that you followed to practice laboratory safety during the experiment.

After you finished the experiment, which of the following did you do?

As a cake bakes, sodium bicarbonate reacts with acids in the cake. The bicarbonate ion and the anion in the acid change places to make carbonic acid. The carbonic acid then breaks down to produce carbon dioxide bubbles that make the cake rise. Check all of the reactions that occurred.

Ag2S(s) +

When silver tarnishes, a reaction happens.

How does knowing the reactants and products help you classify a chemical reaction? Write a short paragraph explaining.