Unit 5: Solutions ppm and ppb.

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Presentation transcript:

Unit 5: Solutions ppm and ppb

ppm (parts per million) used to represent very dilute solutions ppm: one part solute in 1,000,000 parts water This is like 1 second of time in 11.5 days!

ppm (parts per million) Example: A 155.3 g sample of pond water is found to have 1.7x10-4 g of Ca3(PO4)2. What is the concentration of Ca3(PO4)2 in ppm?

ppb (parts per billion) used to represent very dilute solutions ppb: one part solute in 1,000,000,000 parts water This is like 1 second of time in 31.7 years!

ppb (parts per billion) Example: An article says that researchers found 0.003 g of mercury in a 1000 L (1000 kg) sample of water. What is the concentration of mercury in ppb?