Review- Law of Conservation of Matter

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

In a chemical reaction, what happens to the mass of the reactants?

Back

The mass of the reactants equals the mass of the products.

Front

If a reactant weighs 12g and one product weighs 5g, how do you find the weight of the other product?

Back

Subtract the weight of the known product from the total weight of the reactants.

Front

What is the total mass of reactants if the products weigh 15g?

Back

The total mass of the reactants is also 15g.

Front

In the reaction A + B -> C, if A weighs 5g and C weighs 9g, how much does B weigh?

Back

B weighs 4g.

Front

What does it mean if the mass of the products is greater than the mass of the reactants?

Back

This would violate the Law of Conservation of Matter, indicating an error in measurement or calculation.

Front

How can you demonstrate the Law of Conservation of Matter with a simple experiment?

Back

By conducting a closed reaction where the mass of reactants is measured before and after the reaction, showing that the mass remains constant.

Front

What is an example of a chemical reaction that illustrates the Law of Conservation of Matter?

Back

The reaction of hydrogen and oxygen to form water, where the total mass of hydrogen and oxygen equals the mass of the water produced.

Front

Why is it important to balance chemical equations?

Back

Balancing chemical equations ensures that the Law of Conservation of Matter is upheld, showing that mass is conserved.

Front

What is a common misconception about the Law of Conservation of Matter?

Back

A common misconception is that matter can be created or destroyed during a reaction; however, it only changes form.