Lab: Physical and Chemical Changes

Question 1

Did you read the Student Guide carefully?

Revolt · Accepted Answer

yes

Question 2

to the of the substances.

Revolt · Accepted Answer

final appearance

Question 3

According to the lab guide, which changes below will you look for in order to test the hypothesis? Check all that apply.

Revolt · Accepted Answer

changes in shape or size; color changes; whether changes are easily reversible; temperature changes; formation of precipitates or gases; changes of state (gas, liquid, or solid)

Question 4

To do this, you will use these observations to compare the of the substances

Revolt · Accepted Answer

initial appearance; of the substances: initial appearance; of the substances.: final appearance

Question 5

Check all that apply.

Revolt · Accepted Answer

Wear chemical resistant gloves.

Question 6

✔ yesX no

Revolt · Accepted Answer

✔ yes

Question 7

Have you gathered all the materials needed? ✔ yesno

Revolt · Accepted Answer

✔ yes

Question 8

Which answer below correctly identifies the type of change and the explanation for the change in calcium carbonate?

Revolt · Accepted Answer

physical change because even though a particle size change was observed, the calcium carbonate retained its original properties and was not transformed into a new substance

Question 9

Which answer below correctly identifies the type of change and the explanation for the boiling of water?

Revolt · Accepted Answer

physical change because even though gas formation was observed, the water was undergoing a state change, which means that its original properties are preserved

Question 10

Which answer below correctly identifies the type of change and the explanation for the separation of the iron with sulfur?

Revolt · Accepted Answer

physical change because even though a color change occured, each solid maintained its original properties, which could be seen as soon as the magnet was applied

Lab: Physical and Chemical Changes Answers

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