Year 9 Practical task (level 1)
Name: ________________________
Class: _______
Letter of Unknown ________
Aim: To find the unknown metal ion using a flowchart
Materials:
-
1 test tube (tiny)
1 unknown
Dropper bottles: Chloride ions (NaCl), Sulfate ions (Na2So4), Hydroxide
ions (NaOH)
Plastic disposable droppers
De-ionised water
Method:
1.
2.
3.
4.
5.
6.
7.
8.
Collect all materials
Rinse out the test tube using the disposable dropper and de-ionised water
Place 1 dropper full of the unknown into the test tube
Add 2 drops of the NaCl to the test tube and mix
Record the results
Repeat steps 2. and 3. above
Add 2 drops of the Na2So4 to the test tube and mix
Record results
Results:
The metal ion of the unknown is: ______
Discussion:
1. Write the formula for the unknown __________________
2. Using the flowchart, explain how you obtained your results.
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3. Explain how you could improve the method to increase accuracy.
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Conclusion: