Chemical and Physical Properties Prelab SD Flashcards


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chemistry 1 lab
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1

Which of the following would NOT be a clear indication of a chemical change?

a. after adding two substances together, a new odor is detected

b. mixing bicarbonate and acid causes bubbles to form

c. after heating a solution, bubbles form

d. mixing two liquids together causes a thick substance to form, that is clearly of different composition to that of either liquid.

e. heating Mg causes it to turn white

c. after heating a solution, bubbles form

Explanation: a change in heat doesn’t always mean there was a chemical change.

2

A change in heat, whether endothermic or exothermic, is always a clear indication of a chemical change.

False

3

Water has a boiling point of 100 degrees Celsius is an example of

a physical property

4

Iron rusting is an example of

a chemical change

5

Silver tarnishing is an example of

a chemical change

6

Alcohol freezing is an example of

a physical change