Year 8 Chemical Reactions

Front

What is a chemical equation?

Back

A chemical equation is a symbolic representation of a chemical reaction, showing the reactants and products involved.

Front

What are the products in the reaction: sodium + chlorine -> sodium chloride?

Back

The products are sodium chloride.

Front

Which of the following is NOT evidence of a chemical reaction?

Back

Solid becoming liquid is NOT evidence of a chemical reaction.

Front

What is a biological catalyst called?

Back

A biological catalyst is called an enzyme.

Front

What type of reaction is represented by 2MgO -> 2Mg + O2?

Back

This is an example of a breaking down reaction.

Front

What are reactants in a chemical reaction?

Back

Reactants are the starting substances that undergo a chemical change.

Front

What is a product in a chemical reaction?

Back

A product is a substance that is formed as a result of a chemical reaction.

Front

What is the law of conservation of mass?

Back

The law of conservation of mass states that mass is neither created nor destroyed in a chemical reaction.

Front

What is a catalyst?

Back

A catalyst is a substance that speeds up a chemical reaction without being consumed in the process.

Front

What is an example of a combustion reaction?

Back

An example of a combustion reaction is the burning of methane: CH4 + 2O2 -> CO2 + 2H2O.