Describing Chemical Reactions

Front

Is this a chemical or a physical change?

Back

Physical change

Front

Why is tearing a piece of paper only a physical change?

Back

It only changes its size, but it's still paper

Front

Is burning a campfire a chemical or physical change?

Back

Chemical

Front

Why is burning a campfire a chemical change?

Back

It created a new substance with new properties

Front

Why is this model accurate?

Back

It has the correct number of molecules and atoms for both sides of the equation.

Front

In this model, the reactants are...
Options: 2H₂O, H₂O₂, 2H₂, O₂

Back

2H₂O

Front

In this model, the PRODUCTS are: 2KI and 2KNO₃, 2KI and Pb(NO₃)₂, PbI₂ and 2KI, PbI₂ and 2KNO₃

Back

PbI₂ and 2KNO₃

Front

What does the ARROW mean in a chemical reaction?

Back

yields

Front

PRECIPITATE

Back

When a solid forms after 2 liquids mix and react.

Front

Is ice freezing a physical or chemical change?

Back

physical