50 " mL of " water on titration with standard soap solution gave the following results: Lather
Channel: Doubtnut
Date: 2020-07-12

50 " mL of " water on titration with standard soap solution gave the following results: Lather factor `=0.4` mL, total hardness `(TH)=8.2mL`, permanent hardness (PH)`=2.5mL` and standard hard water (containing `0.2 g CaCO_3L^(-1))=19.9mL`. Calculate each type of hardness in ppm.