Conservation of mass

What does the law of conservation of mass state?

Mass cannot be created or destroyed in a chemical reaction.

Why is the mass of reactants equal to the mass of products in a reaction?

Because no atoms are lost or gained during the reaction.

How do you demonstrate conservation of mass in a closed system?

By measuring the mass of the reactants and products in a sealed container.

What happens to the mass in a reaction if there is a gas produced?

The mass of the system remains constant if contained, but may seem to decrease if gas escapes.

How is mass conserved during combustion reactions?

The mass of reactants (fuel + oxygen) is equal to the mass of products (CO₂ + H₂O).

What is a practical example of conservation of mass?

The reaction of magnesium with oxygen forms magnesium oxide, where total mass remains constant.

How can conservation of mass be applied in industrial reactions?

It ensures that materials are used efficiently, and waste is minimized.

Can mass be created or destroyed in nuclear reactions?

No, but nuclear reactions involve a small loss of mass converted to energy.

What happens to the reaction rate if the limiting reactant is increased?

The reaction will continue until the new amount of the limiting reactant is used up.

How can the conservation of mass be used to check the accuracy of reactions?

By comparing the mass of reactants and products and ensuring they are balanced.

What happens when a gas escapes during a reaction in an open system?

The system loses mass, violating the principle of conservation of mass.

In what types of reactions is conservation of mass especially important?

In industrial processes where efficiency is crucial, such as in manufacturing.

How can conservation of mass be applied in environmental science?

It helps track pollutants and waste products, ensuring minimal impact on the environment.

What would happen if a reaction occurred in an open container?

Some of the reactants or products may escape, causing an apparent loss of mass.

How do closed systems support the law of conservation of mass?

A closed system prevents the loss or gain of substances, ensuring mass is conserved.