100 mL sample of hard water is passed through a column of the ion exchange resin RH_(2). The water coming off the column requires 15.17 mL of 0.0265 M NaOH for its titration. What is the hardness of water as "ppm" of Ca^(2+)?

100 mL sample of hard water is passed through a column of the ion exch

1.	100 mL sample of hard water is passed through a column of the ion exchange resin RH_(2). The water coming off the column requires 15.17 mL of 0.0265 M NaOH for its titration. What is the hardness of water as "ppm" of Ca^(2+)?
Answer» ANSWER :`80.40`;