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MUSCAT CHEMICAL TAG::
Test for Iron in water is based on colour indicator.
Test for Iron in water:
Reagents: Standard Mohr’s salt solution 1,10 phenanthroline solution Hydroxylamine hydrochloride solution
.Compare the colour of sample water with the colour of the other tubes.
.Deduce the amount of iron from the colour chart of iron.
Result: The amount of iron in the sample is ________mg/L.
Standard chart for Iron
|
Test tube number |
No. of drops of Mohr’s salt solution |
No. of drops of distilled water |
Hydroxylami ne Hydrochlorid e solution (in drops) |
1,10 phenathrol ine solution (in drops) |
Amount of Iron (in ppm) |
|
1 |
0 |
20 |
1 |
3 |
0.0 |
|
2 |
2 |
18 |
1 |
3 |
0.09 |
|
3 |
4 |
16 |
1 |
3 |
0.18 |
|
4 |
6 |
14 |
1 |
3 |
0.27 |
|
5 |
8 |
12 |
1 |
3 |
0.36 |
|
7 |
10 |
10 |
1 |
3 |
0.45 |
|
7 |
12 |
8 |
1 |
3 |
0.54 |
|
|
|
Procedure:
1st step : 20, 18,16,14,12,10 and 8 drops of distilled water was taken in 7 test tubes with a calibrated pipette.
2nd step : Adding 0,2,4,6,8,10 and 12 drops of Mohr’s salt solution to each of the above tubes so that the volume in each is equal to 20 mL.
3rd step : 20 drops of sample water was taken into a different tube with the same pipette.
4th step : Adding 1 drops of Hydroxylamine Hydrochloride solution into each tube.
5th step Add 3 drops of 1,10 phenanthroline solution to each tube, stir the solutions and wait for 5 minutes for the colour to develop ( reddish pink colour).
3rd step : 20 drops of sample water was taken into a different tube with the same pipette.
4th step : Adding 1 drops of Hydroxylamine Hydrochloride solution into each tube.
5th step Add 3 drops of 1,10 phenanthroline solution to each tube, stir the solutions and wait for 5 minutes for the colour to develop ( reddish pink colour).