Chemical Reactions and Conservation of Mass

The video introduces the Law of Conservation of Mass, explaining that mass is neither created nor destroyed in chemical reactions. It was established in 1789 by a French chemist. The video demonstrates this law using a practical example of mixing baking soda and vinegar, showing that the mass remains constant before and after the reaction. The balanced chemical equation illustrates the rearrangement of elements. The video concludes with an invitation to explore more resources on the topic.

What is the relationship between the mass of reactants and products in a chemical reaction?

• The mass of reactants is always greater.

• The mass of products is always greater.

• The mass of reactants and products is equal.

• The mass of reactants is always less.

Who formulated the Law of Conservation of Mass?

• Marie Curie

• Albert Einstein

• Isaac Newton

• Antoine Lavoisier

What does the Law of Conservation of Mass state about mass in chemical reactions?

• Mass is destroyed during reactions.

• Mass is created during reactions.

• Mass is doubled during reactions.

• Mass is neither created nor destroyed.

In the example of mixing baking soda and vinegar, what happens to the mass after the reaction?

• The mass decreases.

• The mass increases.

• The mass is halved.

• The mass remains the same.

What is produced when baking soda and vinegar are mixed?

• A gas

• A liquid

• A solid

• A plasma

How does the balanced equation for the reaction between baking soda and vinegar demonstrate the Law of Conservation of Mass?

• It shows more products than reactants.

• It shows no products formed.

• It shows equal mass of reactants and products.

• It shows more reactants than products.