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Four samples of water are collected at Kunchanapalli (KB), Gundimeda (GM), Vaddeswaram (VB) and the other at Green Fields (GF). 100 ml of each water sample collected at KB, GM, VB and GF requires 28, 26, 20 and 18 ml of EDTA solutions on titrations respectively. 100 ml of SHW (0.28 g of CaCO3 per liter) requires 22 ml of EDTA solution on titration. Calculate and compare the degree of hardness and write the chemical reactions involved in titrations.

Four samples of water are collected at Kunchanapalli (KB), Gundimeda (GM),
Vaddeswaram (VB) and the other at Green Fields (GF). 100 ml of each water sample
collected at KB, GM, VB and GF requires 28, 26, 20 and 18 ml of EDTA solutions on
titrations respectively. 100 ml of SHW (0.28 g of CaCO3 per liter) requires 22 ml of
EDTA solution on titration. Calculate and compare the degree of hardness and write the
chemical reactions involved in titrations.

Grade:12th pass

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