Exploring Chemical Changes and Reactions

Which of the following is a property of acids?

• Bitter taste

• Slippery feel

• Sour taste

• Turns red litmus paper blue

How does increasing the temperature generally affect the rate of a chemical reaction?

• It decreases the rate

• It has no effect

• It increases the rate

• It stops the reaction

Which of the following is an indicator of a chemical change?

• Change in shape

• Change in color

• Change in size

• Change in state

What happens to the rate of a chemical reaction when the temperature is decreased?

• The rate increases

• The rate decreases

• The rate remains the same

• The reaction stops completely

Which of the following is a sign that a chemical reaction has occurred?

• A solid melts

• A gas is produced

• A liquid evaporates

• A substance is dissolved