Question

Chemistry practical hardness of water to be determined by edta method

Answer 1

we use EDTA, Water sample,Buffer soln ,EBT indicator,Znso4 soln,.
add 2 ml of buffer and 2 drops of EBT to Znso4 soln .Titrate against EDTA taken in burette.note the readings.claculate it (M1 V1 = M2 V2)
add 2 ml buffer soln and 2 drops of EBT to water sample.Titrate it against EDTA taken in Burette.Note the readings in burette. calculate it (M2 V2= M3 V3)
you will get the results.