Chemical Reactions Video/ Reading

Front

What is a chemical reaction?

Back

A process where substances (reactants) undergo a transformation to form new substances (products).

Front

What is produced when hydrogen peroxide decomposes?

Back

Oxygen gas and water.

Front

What is the difference between a physical change and a chemical change?

Back

A physical change does not alter the chemical composition of a substance, while a chemical change results in new substances being formed.

Front

What is an exothermic reaction?

Back

A reaction that releases heat to the surroundings.

Front

What is the role of a catalyst in a chemical reaction?

Back

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

Front

What is the law of conservation of mass?

Back

In a chemical reaction, mass is neither created nor destroyed; the total mass of reactants equals the total mass of products.

Front

What is an indicator in chemistry?

Back

A substance that changes color to indicate the presence of a specific chemical or the pH level.

Front

What happens during a combustion reaction?

Back

A substance reacts with oxygen, releasing energy in the form of heat and light.

Front

What is the pH scale?

Back

A scale that measures how acidic or basic a solution is, ranging from 0 (acidic) to 14 (basic), with 7 being neutral.

Front

What is a reactant?

Back

A substance that undergoes a chemical change in a reaction.