12 ml of saturatedsolution .001gr of CaCO_(3) were required in the titration of 100 ml of water to produce a good lether its degree of hardness is

12 ml of saturatedsolution .001gr of CaCO_(3) were required in the tit

1.	12 ml of saturatedsolution .001gr of CaCO_(3) were required in the titration of 100 ml of water to produce a good lether its degree of hardness is
Answer» 100 ppm 120 ppm 60 ppm 80 ppm SOLUTION :In 1 ml0.001 g of `CaCO_3` is RESENT 12 ML = ` 12 xx 0.001 g = 0.012g` hardness = `0.012/100 xx 10^6 = 120` ppm