1. Y E A R 8 – S T U D E N T R E S E A R C H P R O J E C T
MAKING OBSERVATIONS
AND INFERENCES

2. AIM
• To observe a variety of chemical reactions and make
inferences.

3. EQUIPMENT
• dilute hydrochloric acid (1
M)
• dilute sodium hydroxide
solution (1 M)
• dilute sulfuric acid (1 M)
• sodium thiosulfate crystals
• 2 small pieces of
magnesium ribbon
• copper sulfate solution (0.1
M)
• barium chloride solution
(0.1 M)
• marble chip
• potassium permanganate
solution (0.001 M)
• hydrogen peroxide (3%
solution)
• 7 test tubes
• test tube rack
• test tube holder

4. RISK ASSESSMENT
Risk Injury Prevention
Write a risk assessment for your experiment here

5. METHOD
1. Number the seven test tubes.
2. Carry out the seven reactions below. For each reaction
record your observations and make inferences for each
of the reactions in your results table.
Reaction 1
• Put a piece of magnesium in the test tube and add a small
amount of dilute hydrochloric acid. Don’t forget to point
the test tube away from yourself and other people, and
wear safety glasses.

6. METHOD
Reaction 2
• One-third fill the test tube with copper sulfate solution. Add a
piece of magnesium.
Reaction 3
• One-third fill the test tube with water. Add about a spatula of
hypo crystals and shake to dissolve.
Reaction 4
• Add a small amount of copper sulfate solution to a test tube.
Then add a small amount of sodium hydroxide solution
(caustic soda) and let the test tube stand for a few minutes.

7. METHOD
Reaction 5
• Add a small amount of barium chloride to a test tube. Then add
a small amount of sulfuric acid.
Reaction 6
• Put a marble chip in the test tube and add a small amount of
dilute hydrochloric acid.
Reaction 7
• Add a small amount of potassium permanganate solution to a
test tube. Then add 2 or 3 drops of hydrogen peroxide.

8. RESULTS
• Write a heading for your table.
Reaction Observation Inference
1
2
3
4
5
6
7

9. CONCLUSION
• Write your conclusion here.