Physical Science Practical Midterm 2023

What type of reaction was first reaction in your lab from Friday? We added Calcium chloride (white nerds looking stuff) to water and phenol red.

• endothermic

• exothermic

• physical

• none of those choices

What type of reaction was second reaction in your lab from Friday? We added baking soda (white powder) to the calcium chloride, water, and phenol red solution.

• endothermic

• exothermic

• physical

• none of those choices

Endothermic reactions feel cold because they are

• absorbing energy.

• releasing energy.

• doing nothing with energy.

Exothermic reactions feel hot because they are

• absorbing energy.

• releasing energy.

• doing nothing with energy.

We added phenol red to our experiment, because it is a(n)

• acid/base indicator.

• only acid indicator.

• only base indicator.

• none of the above.