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Question
Define the following modes of expressing the concentration of a solution. Which of these modes are independent of temperature and why?
ppm. (parts per million)
Solution
Parts per million or ppm is a unit of measure of dissolved solids in solution, in terms of a ratio between the number of parts of solids/solute to a million parts of total volume. Thus,
1 parts per million (ppm): Is a concentration of solution that contains 1 gram solute and 1000000 ml solution (same as 1 miligram solute per litre of solution)
= `"No. of parts of the component"/"Total number of parts of the solution" xx 10^6`
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