Solving Using PPM (Parts Per Million)

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Solution Concentration: Parts Per Million

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Key Questions

  • ppm is parts per million.

    Just as a percentage is 1 part in 100 ppm is one part in a million. It's used to avoid very small numbers.

    E.g a gas in the atmosphere could be #0.03%#

    To convert ppm you x by #10^4# to give 300ppm.

  • In order to calculate the parts per million you will need to know how many mg of solute is dissolved in 1000g (1L) of water.

    #(0.001g)/(1000g)# = 0.000001
    Multiplying 0.000001 by 1,000,000 gives a result of 1ppm.

    Here is a video discussing this type of calculation. In the video, the number of moles of barium present in a 1L sample of water with a barium concentration of 2ppm is calculated.

    2 ppm is the maximum allowable level for barium in drinking water in the US as established by the EPA .

    video from:Noel Pauller

  • Answer:

    It's often used to measure contaminants, but there's other applications.

    Explanation:

    When you read about an article about air pollution or water pollution, you'll often see it refer to the concentration of contamination in ppm.

    here's a NASA article talking about the concentration of CO2 in the atmosphere reaching 400ppm.

    You can also get a water quality tester to see the concentration of foreign particles in the water.

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