Experiments

• What are some safety rules when doing experiments?

• What should you do if you burn yourself when using a bunsen burner?

• Why do we wear safety glasses when doing experiments?

Experiment: Chemical Reactions

You will be doing 7 mini experiments. In your book put the heading above. For each of the

small experiments put a new subheading.At each station read and follow the instructions

carefully.In your book write your observations and

answer any questions on each work station.

Steel Wool and Copper Sulfate

• Add 20mL of copper sulfate solution to a beaker.

• Put a small amount of iron wool into a beaker.• What happened to the iron wool, write this

description in your book.• Is this a physical or chemical change?• What are the signs?

Marble Chips and Acid

• Put 5 small marble chips into 1cm depth of acid in a test tube.

• Record the reaction.

Carbonate and Vinegar (acid)

• Vinegar is a weak acid.• Dissolve a level teaspoon of bicarbonate of soda

in 50mL of water. Is there any reaction taking place?

• In another beaker add 50mL of white vinegar. • Then tip the bicarbonate solution into the

beaker with the vinegar.• Observe the reaction, is this physical or

chemical.

Chalk and Acid

• Grind a small amount of chalk in a mortar and pestle, use small motions.

• Measure 50mL of water in a measuring cylinder add this to a beaker.

• Add this powdered chalk to beaker of water. • Is there any reaction taking place?• Pour a small amount of acid into a beaker and

add some chalk mixture to this.• Is there any reaction taking place?

Magnesium and Acid

• In a test tube add a small amount (5 cm) of hydrochloric acid.

• Add a small strip of hydrogen to this test tube.• Is there a chemical reaction taking place?• What are the signs of this? (feel the test tube)

Sodium Sulfate and Barium Chloride

• On a dropper plate add 3 drops of sodium sulfate and 3 drops of barium chloride.

• Observe the reaction, what are the signs of the chemical reaction?

Burning Magnesium

• Light a Bunsen burner using the correct method.

• Using tongs to hold a small strip of magnesium near the flame.

• Describe the reaction• What are the signs a chemical reaction has

taken place.