Everything Science Grade 10

CHAPTER 12. THE PARTICLES THAT SUBSTANCES ARE MADE OF 12.1

General experiment: Investigating elements and com-

pounds

Aim: To investigate three reactions to learn about elements and compounds.

Apparatus:

• Cal-C-Vita tablet


• test tubes


• Bunsen burner


• rubber stopper


• delivery tube


• lime water (a saturated solution of
  Ca(OH) 2 )


• candle


• matches


• copper sulphate (CuSO 4 · 5 H 2 O)


• zinc metal


• hydrochloric acid (HCl)
  Method:
  Reaction 1

1. Pour clear lime water into a test tube.

2. Into a second test tube place a Cal-C-Vita tablet. Cover the tablet with water

and immediately place a stopper and delivery tube into the test tube.

3. Place the other end of the delivery tube into the lime water in the first test

tube. Allow it to bubble for 1-2 minutes.

4. Now remove the stopper from the second test tube and hold a lit candle at

the mouth of the test tube.

5. Record your observations.

Reaction 2

1. Place a few drops of zinc metal in a test tube and cover the pieces with dilute

hydrochloric acid.

2. Record your observations.

3. Now hold a burning match in the mouth of the test tube and observe what

happens.

Chemistry: Matter and materials 209