Chemical Reactions

Front

What is a chemical reaction?

Back

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

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 are reactants in a chemical equation?

Back

Substances that undergo a chemical change during a reaction, found on the left side of the equation.

Front

What are products in a chemical equation?

Back

Substances formed as a result of a chemical reaction, found on the right side of the equation.

Front

What does a balanced chemical equation represent?

Back

It shows that the number of atoms for each element is the same on both sides of the equation, indicating mass conservation.

Front

What is a physical change?

Back

A change that affects one or more physical properties of a substance without altering its chemical composition.

Front

What is a chemical change?

Back

A change that results in the formation of new chemical substances, often accompanied by energy changes.

Front

What is a coefficient in a chemical equation?

Back

A number placed before a chemical formula to indicate how many molecules or moles of that substance are involved in the reaction.

Front

What is an example of a chemical change?

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Baking powder fizzing when mixed with water, indicating a chemical reaction.

Front

What is an example of a physical change?

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Mixing lemonade powder with water, which does not change the chemical composition of the substances.