pH VALUE OF WATER

 

pH VALUE OF WATER

AIM:

To find out the pH value of water.

APPARATUS REQUIRED:

1. Glass beaker of 250 ml capacity

2. One or two electrode pH meter.

3. Known pH solution buffer of standard strength.

4. A glass stirred rod

5. A thermometer



SAMPLE

Analysis of the sample will be carried out as soon as possible and preferably in the field test during the sampling. The pure water and water that are not in contact with the atmosphere will be collected in the container and stored capped before analysis. (Reference IS: 3025 (Part XI) - 1983)

PROCEDURE:

1. A glass beaker is collected and washed.

2. The water sample to be tested is added to the glass beaker with the addition of the buffer solution and mixed vigorously.

3. Allow a minimum of one hour to allow the sample to stabilize its temperature by stirring occasionally as it waits.

4. Calibrate the pH meter temperature controller to the temperature of the sample.

5. Calibrate the pH-value using the standard solution.

6. Dip the electrode into the sample of water, leave the sample 30 seconds to stabilize the meter.

7. Record and document the pH reading of sample given.

NOTE: 

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It is not allowed to have an acceptable value that is lower than 6.

REFERENCE:

 IS: 3025 (PART 11) - 1983

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