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# Parts per Million (ppm)

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Sections
Solutions
Solubility and Intermolecular Forces
Solutions: Mass Percent
Percent Concentrations
Molarity
Osmolarity
Parts per Million (ppm)
Solubility: Temperature Effect
Intro to Henry's Law
Henry's Law Calculations
Dilutions
Solution Stoichiometry
Electrolytes (Simplified)
Equivalents
Molality
The Colligative Properties
Boiling Point Elevation
Freezing Point Depression
Osmosis
Osmotic Pressure

Parts per Million (ppm) and Parts per Billion (ppb) are used to express extremely dilute solution concentrations.

###### Parts per Million

Concept #1: Parts per Million (ppm)

Example #1: What is the concentration in parts per million of DDT (nonbiodegradable pesticide) in 2.0 mg in 1.0 kg needlefish tissue?

Concept #2: Parts per Billion (ppb)

Example #2: A 2.4 L sample of an aqueous solution contains 0.012 mL of NH3. What is the concentration of NH3 in the solution, expressed as parts per billion?

Practice: A 5.12 L sample of solution contains 0.230 g of potassium sulfate, K2SO4. Determine the concentration of K2SO4 in ppm if the density of the solution is 1.30 g/mL.

Practice: Calculate the concentration in parts per billion of the following aqueous solution: 0.91 mg of caffeine in a total volume of 131 mL.

Practice: Glucose makes up about 0.102% by mass of human blood. Calculate this concentration in ppm.

Practice: The average human body contains about 5,000 grams of blood. What mass of arsenic is present in the body if the amount in blood is 0.86 ppb?

Practice: A water sample contains the pollutant chlorobenzene with a concentration of 16 ppm (by volume). What volume of this water contains 5.01×102 mL of chlorobenzene?