Evidence of Chemical Reactions

Front

What are the substances at the beginning of a chemical equation called?

Back

Reactants

Front

What does evidence of a chemical reaction indicate?

Back

A new substance has formed.

Front

Give an example of evidence of a chemical reaction.

Back

Sugar that is burned gives off an odor and turns brown and then black.

Front

What indicates that a new substance was formed when two clear liquids are mixed?

Back

A yellow solid forms and then settles to the bottom of the beaker.

Front

In the equation 2Mg + O2 ---> 2MgO, what are the reactants?

Back

Mg and O.

Front

What is a chemical reaction?

Back

A process where reactants are transformed into products, resulting in the formation of new substances.

Front

What are products in a chemical reaction?

Back

The substances that are formed as a result of a chemical reaction.

Front

What is a common indicator of a chemical reaction?

Back

Color change, gas production, temperature change, or formation of a precipitate.

Front

What is a precipitate?

Back

A solid that forms and settles out of a liquid mixture during a chemical reaction.

Front

What does it mean if a gas is produced during a chemical reaction?

Back

It indicates that a new substance has formed, often observable as bubbles.