3.6 Concentration Calculations (grams/dm^3)

Cards (16)

  • What is the measurement of volume equal to 1,000 centimeters cubed?
    One decimeter cubed
  • What is the equation for calculating concentration?
    Concentration is mass divided by volume
  • How is mass measured in the concentration formula?
    In grams
  • How is volume measured in the concentration formula?
    In decimeters cubed
  • What does the horizontal line in a formula triangle represent?
    • The horizontal line means divide
    • The vertical line means multiply
  • How would you find the concentration using the formula triangle?
    Cover up the 'c' and do mass divided by volume
  • 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 grams per dm<sup>-3</sup>
  • 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 0.48 decimeters cubed of water?
    50 grams per decimeter cubed
  • Why is it important to check the units of the figures given in concentration problems?
    Because 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 calculation do you perform to find the mass using concentration and volume?
    Mass equals concentration times volume
  • What are the key steps to calculate concentration from mass and volume?
    1. Identify mass in grams
    2. Identify volume in decimeters cubed
    3. Use the formula: Concentration = Mass / Volume
  • What are common pitfalls in concentration calculations?
    • Using incorrect units (e.g., kilograms instead of grams)
    • Not converting volume to decimeters cubed