Testing for ions

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A body is found in the sea, but the forensic scientist is suspicious and thinks that the murder took place elsewhere and the person has been dumped in the bath or a local fresh water lake next to a copper mine. What the forensic scientist has to do is do a test to see if he is correct or if he is wrong.


The two tests I had to carry out to do this test were Testing with solutions and Flame test. In the experiment I had to find out what ions were in the water these are my results.

Sea water

Na+ = Sodium

K+ = Potassium

Ca2+ = Calcium

Cl- = Calcium

So4 2- = Sulphate

Co3 e- = Carbonate

Lake water

Ca2+ = Calcium

Cu2- = Copper

Cl- = Chloride

Bath water

Na+ = Sodium

Co3 2 = Carbonate

Safety Points

  1. One safety point that you should consider is to wear goggles because you use dangerous ions in the test and when you put them in the flame they could flick off and go in to some ones eyes.
  2. Another safety point is you should wear a plastic suite and gloves so you do not contaminate the solution and you do not catch any diseases or illnesses from the solutions.
  3. Make sure you follow the procedure properly and do all the steps that you are given and not forget any of them.
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Materials and Methods


  In the experiment there were two different experiments these were testing with solutions and flame test.


  1. Test tube
  2. Solutions
  3. Goggles
  4. Test tube rack

Testing with solutions

  1. Pour approx 3cm depth of control solution into a test tube.
  2. Add a few drops of the specified test solution.
  3. Make a note of any colour changes or precipitates formed.
  4. If a gas is produced, bubble the gas through limewater.


  1. Wire loop
  2. Hydrolic acid
  3.  Bunsen ...

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