Practical Exam
Your are provided with two sample bottles:
Sample A: contains unknown concentrations of Oxalic acid
Sample B: contains unknown concentration of Magnesium sulphate
Experiment 1:
Determination of Oxalic acid by acid-base titration with NaOH:
Procedure:
1-Piptte 10 ml of the sample A into a conical flask.
2- Add 8 drops of phenol phethaline indicator.
3-Titrate with 0.1N NaOH.
4- Repeat the titration and tabulate the results
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Volume difference |
End point |
Starting point |
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1 |
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2 |
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Average |
Experiment 2:
Determination of MgSO4 sample by complex metric titration
Procedure:
1-pipette 10 ml of sample B into clean conical flask
2-Add 40 ml of Distilled water.
3-Add 5 ml of ammonia buffer
4- Add 2 drops of EBT indicator
5- Titrate with 0.01 M EDTA
6- Repeat the experiment and tabulate your results.
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Volume difference |
End point |
Starting point |
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1 |
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2 |
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Average |