Hardness
(Plz give the following details
1. Molarity of EDTA solution)
a.
First titrate the sample containing Ca as well as Mg using Eriochrome Black-T as indicator, Ammonia Ammonium Chloride Buffer Solution pH 10,an note the volume used.this is volume used for total Ca and Mg
b.
Now take sample, add 10 ml of 1 M NaOH, and Calcon Carboxylic Acid as Indicator and titrate with EDTA solution and note the volume used. this is the volume used only for Ca.
c.
For Mg
(Volume of EDTA used in a - Volume of EDTA used in b)
|