How to calculate concentration

• What is the unit for measuring concentration in this context?

  Grams per decimeter cubed
• What is a decimeter cubed equivalent to in centimeters cubed?

  1,000 centimeters cubed
• How is the concentration of a solution calculated?

  Mass divided by volume
• What does the horizontal line in a formula triangle represent?

  Division
• What does the vertical line in a formula triangle represent?

  Multiplication
• How would you find concentration using the formula triangle?

  Mass divided by volume
• If you wanted to find mass using the formula triangle, what would you do?

  Concentration times volume
• How would you find volume using the formula triangle?

  Mass divided by concentration
• What is the concentration of 40 grams of sodium hydroxide in 2.5 decimeters cubed of water?

  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?

  Divide by 1,000
• What is the concentration of 24 grams of copper sulfate in 480 centimeters cubed of water?

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

  To avoid common mistakes in calculations
• How would you find the mass of hydrogen chloride in a 400 centimeters cubed sample with a concentration of 20 grams per decimeter cubed?

  Convert to decimeters cubed and multiply
• What mass of hydrogen chloride is in a 400 centimeters cubed sample with a concentration of 20 grams per decimeter cubed?

  8 grams
• What is the process for calculating concentration from mass and volume?

  • Identify mass in grams
  • Identify volume in decimeters cubed
  • Use the formula: Concentration = Mass / Volume
• What are the steps to convert centimeters cubed to decimeters cubed?

  1. Take the volume in centimeters cubed
  2. Divide by 1,000
  3. Result is in decimeters cubed
• What are the common pitfalls in concentration calculations?

  • Incorrect unit conversions
  • Misunderstanding the formula triangle
  • Confusing mass and volume