Four samples of water are collected at Naravari palli (NP), Pullaiahgari palli (PP), Kunchivari Palli (KP) and the other at Bandara Palli (BP). 100 ml of the each water sample collected at NP, PP, KP, and BP requires 28, 26, 20, 18 mL of EDTA solution on titrations respectively. 100ml of standard hard water (0.28 g of CaCO3 per liter) requires 24ml of EDTA solution on titration. Calculate and compare the degree of hardness and Write the chemical reactions involved in titration

Four samples of water are collected at Naravari palli (NP), Pullaiahgari palli (PP), Kunchivari Palli (KP) and the other at Bandara Palli (BP). 100 ml of the each water sample collected at NP, PP, KP, and BP requires 28, 26, 20, 18 mL of EDTA solution on titrations respectively. 100ml of standard hard water (0.28 g of CaCO3 per liter) requires 24ml of EDTA solution on titration. Calculate and compare the degree of hardness and Write the chemical reactions involved in titration