Law of Conservation of Mass and Chemical Reactions

_________ are the substances that are produced in a chemical reaction.

• Reactants

• Producer

• Reaction

• Product

________ are the starting substances in a chemical equation.

• Reactants

• Producer

• Reaction

• Products

Solve for the unknown mass: 6.1 g + ? g = 9.1 g

• 15.2

• 3 g

• 15.2 g

• 3

Which of the following is the best description of the results of a chemical reaction?

• The substance seems to disappear after dissolving in water.
• The substance changes from liquid to solid at a low temperature.
• The reaction can be reversed to get back the original substance.
• A new substance with different properties is formed.

What type of reaction is shown below?
A + B --> AB

• Synthesis
• Decomposition
• Single Replacement
• Double Replacement

What type of reaction is shown below?
AB --> A + B

• Synthesis
• Decomposition
• Single Replacement
• Double Replacement

What type of reaction is shown below?
AB + X --> AX + B

• Synthesis
• Decomposition
• Single Replacement
• Double Replacement

What type of reaction is shown below?
AB + XY --> AY + BX

• Synthesis
• Decomposition
• Single Replacement
• Double Replacement

What happens in a chemical reaction?

• Bonds between atoms break and/or are formed

• New atoms are created and/or removed

• Protons move from one atom to another

• Electrons change into protons

What is the Law of Conservation of mass?

• Mass is created in a chemical reaction
• Mass is created in a physical change
• New chemicals formed from a chemical reaction have a larger overall mass than the original reactants
• Mass is never created or destroyed