Conservation of Matter - Key Concepts

Front

What is the Law of Conservation of Matter?

Back

The Law of Conservation of Matter states that matter cannot be created or destroyed in a chemical reaction; it can only change forms.

Front

What does it mean for a chemical equation to be balanced?

Back

A balanced chemical equation has the same number of each type of atom on both sides of the equation, indicating that matter is conserved.

Front

Example of a balanced chemical equation: Mg + Cl₂ → MgCl₂. Is it balanced?

Back

Yes, it is balanced because there is 1 magnesium atom and 2 chlorine atoms on both sides.

Front

Example of an unbalanced chemical equation: N₂ + 2O₂ → N₂O₅. Is it balanced?

Back

No, it is not balanced because there are 2 oxygen atoms on the left and 5 on the right.

Front

What is the significance of balancing chemical equations?

Back

Balancing chemical equations is crucial because it reflects the conservation of mass and allows for accurate stoichiometric calculations.

Front

What is a reactant in a chemical reaction?

Back

A reactant is a substance that undergoes change during a chemical reaction.

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

In the equation 2H₂ + O₂ → 2H₂O, how many molecules of water are produced?

Back

2 molecules of water (H₂O) are produced.

Front

What is the role of coefficients in a chemical equation?

Back

Coefficients indicate the number of molecules or moles of a substance involved in the reaction.

Front

What does it mean if a chemical equation is not balanced?

Back

If a chemical equation is not balanced, it means that the number of atoms of each element is not the same on both sides, violating the Law of Conservation of Matter.