Concertration of solutions

• What is the measurement of volume equal to 1,000 centimeters cubed?

  One decimeter cubed
• How is concentration calculated?

  Concentration is calculated as mass divided by volume
• What does the formula triangle for concentration represent?

  • Mass is on the top
  • Concentration is mass divided by volume
  • Volume is mass divided by concentration
  • Horizontal line means divide, vertical line means multiply
• If you have 40 grams of sodium hydroxide in 2.5 decimeters cubed of water, what is the concentration?

  16 grams per decimeter cubed
• How can we express grams per decimeter cubed in a different notation?


  As $dm^{-3}$
• How do you convert 480 centimeters cubed to decimeters cubed?

  By dividing by 1000 to get 0.48 decimeters cubed
• What is the concentration of 24 grams of copper sulfate in 480 centimeters cubed of water after conversion?

  50 grams per decimeter cubed
• Why is it important to check the units of the figures given in concentration problems?

  Because using incorrect units can lead to mistakes in calculations
• If a sample of hydrochloric acid has a concentration of 20 grams per decimeter cubed and a volume of 400 centimeters cubed, what mass of hydrogen chloride is in the solution?

  8 grams
• How do you convert 400 centimeters cubed to decimeters cubed?

  By dividing by 1000 to get 0.4 decimeters cubed
• What is the formula to find mass using concentration and volume?

  Mass = Concentration × Volume
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