Question

Part A:

What is the volume of water needed for this experiment?
a) 8 tablespoons
b) 2 teaspoons
c) Half a cup


Part B:
How do you determine if a chemical reaction is taking place?
a) By color change
b) By measuring temperature
c) By tasting it
d) By smelling it

Part C:
What should you measure and record after adding the water to the chemical reaction?
a) Mass of the container
b) Temperature of the chemical reaction
c) pH level of the chemical reaction
d) Time it takes to react

Part D:
How can you tell if the chemical reaction absorbed or released energy?
a) By observing a change in color
b) By measuring the temperature change
c) By listening for a sound
d) By checking the pH level

Part E:
Can this chemical reaction be used for a cold pack?
a) Yes, because it absorbs energy
b) No, because it releases energy

Answer 1

The volume of water needed for the experiment is half a cup. A color change is an indicator of a chemical reaction. After adding the water, you should measure and record the time it takes to react. Measuring the temperature change can determine if the reaction absorbed or released energy. This chemical reaction can be used for a cold pack because it absorbs energy.

Step-by-step explanation:

The volume of water needed for the experiment is c) Half a cup. This is because a cup is a commonly used unit for measuring liquids, and half a cup is a specific measurement.

To determine if a chemical reaction is taking place, you can look for several indicators. The correct answer is a) By color change. This is because a change in color often signifies a chemical reaction.

After adding the water to the chemical reaction, you should measure and record d) Time it takes to react. This is because the time it takes for the reaction to occur can provide valuable information.

To determine if the chemical reaction absorbed or released energy, you can look for certain signs. The correct answer is b) By measuring the temperature change. This is because changes in temperature can indicate whether energy was absorbed or released.

This chemical reaction can be used for a cold pack. The correct answer is a) Yes, because it absorbs energy. This is because cold packs typically rely on reactions that absorb energy to create a cooling effect.