Double titration||hardness OF water

question based on double titration,hardness OF water

What is hardness of water ?

100 mL sample of hard water is titrated with 500 mL of 0.001 MEDTA solution at pH=10 , using eriochrome black -T indicator to reach equivalence point. An equal another amount of hard water sample is boiles for 30 mi n . After filtration and cooling, the same sample is titrated with 200 mL of 0.001 M EDTA solution at pH=10 using Mg-EDTA complex solution and erichrome black -T indicator to reach equivalence point. a. Calculate the total hardness of water sample (temprary +permanent) in p p m of CaCO_(3) . b. Calculate the permanent hardness of water sample is p p m of CaCO_(3) . c. Calculate the temporary hardness of water sample is p p m of CaCO_(3) .

100 mL sample of hard water is titrated with 500 " mL of " 0.001 M EDTA solution at pH=10 , using eriochrome black-T indicator to reach equivalence point. An equal another amount of hard water sample is boiled for 30 min. After filtration and cooling, the same sample is titrated with 200 " mL of " 0.011 M EDTA solution at pH=10 using Mg-EDTA complex solution and erichrome black-T indicator to reach equivalence point. (i). Calculate the total hardness of water sample (temporary + permanent) in ppm of CaCO_3 . (ii). Calculate the permanent hardness of water sample in ppm of CaCO_3 . (iii). Calculate the temporary hardness of water sample in ppm of CaCO_3

The salt responsible for permanent hardness of water is

Double titration| Back titration| Questions based on titration

How is temporary hardness in water removed?