1.

Name the forms in which the chlorides are present in water.

2.

How can you determine the chloride content in water?

3.

What is Mohr's method for the determination of chloride ions in a water sample?

4.

Write the reactions involved in Mohr's method.

5.

Name the indicator used in this experiment.

6.

At what pH can you determined the chloride ion in the given water sample?

7.

What is the other name of this method?

8.

What is the optimum pH for the experiment?

9.

What are precipitation titrations?

10.

What are the indicators used in precipitation titrations?

11.

How can the required pH for the experiment be achieved if it is lower than 7?

12.

What is the significance of Cl ^? ion determination?

1.

Chlorides are present in water as NaCl, MgCl ₂ and CaCl ₂.

2.

The chloride content in a water sample can be determined by Mohr's method.

3.

In Mohr's method, the given water sample is titrated against standard AgNO ₃ solution using potassium chromate as an indicator.

4.

5.

Potassium chromate is used as indicator.

6.

For chloride ion determination, the water sample should be neutral or faintly alkaline because Ag ₂CrO ₄ is readily soluble in acidic medium.

7.

Argentometric method.

8.

The reaction should be carried out at pH 7 to 10.

9.

The titrations accompanied by the formation of sparingly soluble salts, when the...