Q&A - Ask Doubts and Get Answers
Q

A sample of drinking water was found to be severely contaminated with chloroform CHCl_3 supposed to be a carcinogen.The level of contamination was 15 ppm (by mass):(ii) determine the molality of chloroform in the water sample.

Q. 2.9 A sample of drinking water was found to be severely contaminated with chloroform (CHCl_{3})  supposed to be a carcinogen. The level of contamination was 15\; ppm (by mass):

                (ii) determine the molality of chloroform in the water sample.

Answers (1)
Views

Moles of chloroform  :

                                      =\frac{15}{119.5} = 0.1255\ mol

Mass of water is 10^6.      (Since contamination is 15 ppm)

So molality will be :

                                    =\frac{0.1255}{10^6}\times1000 = 1.255\times10^{-4}\ m 

Exams
Articles
Questions