4 A 200 g sample of hard water is passed through the column

Last updated: 6/30/2023

4 A 200 g sample of hard water is passed through the column of cation exchange resin in which H is exchanged by Ca The outlet water of column required 50 mL of 0 1M NaOH for complete neutralization What is the hardness of Ca ion in ppm A 250 ppm B 500 ppmC 750 ppmD 1000 ppm