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CBSE Class 11-science Answered

Sir, how can we convert ppm into any other unit of mass?
Asked by | 07 Jun, 2008, 08:54: PM
Expert Answer

ppm is equivalent to part per million by weight.i.e by level of contamination is 15 ppm we mean that if 1 kg of water s taken then content of CHCl3 is 15 × 10-6 kg.

Now no. of moles of CHCl3 = 15 × 10-3 /119.5=n(let)

then molality = n/(1-15 × 10-6

Putting the value of n we get the molality of chloroform in  solution.

Answered by | 18 Jun, 2008, 02:57: PM
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