Moles, concentration and volume calculation

• What does the equation link in chemistry regarding aqueous substances?

  The number of moles to its concentration and volume
• How is volume measured in this context?

  In decimeters cubed
• How is concentration expressed in this context?

  In moles per decimeter cubed
• What does the forward slash in concentration notation signify?

  It means "per"
• How can the formula for moles, concentration, and volume be represented using symbols?

  n = c × v, where n is moles, c is concentration, and v is volume
• If you have 800 cm³ of sodium hydroxide at a concentration of 0.2 moles per decimeter cubed, how many moles do you have?

  0.16 moles
• How do you convert 800 cm³ to decimeters cubed?

  By dividing by 1000 to get 0.8 decimeters cubed
• What is the concentration of hydrochloric acid if you have 1.5 decimeters cubed containing 0.6 moles?

  0.4 moles per decimeter cubed
• How do you find the concentration from moles and volume?

  By dividing moles by volume
• If you have 30 cm³ of 0.5 moles per decimeter cubed potassium hydroxide reacting with 25 cm³ of sulfuric acid, what is the first step to find the concentration of sulfuric acid?

  Convert all volumes to decimeters cubed
• How do you convert 30 cm³ to decimeters cubed?

  By dividing by 1000 to get 0.03 decimeters cubed
• How do you calculate the number of moles of potassium hydroxide?

  By multiplying its concentration by its volume
• What is the number of moles of potassium hydroxide if its concentration is 0.5 moles per decimeter cubed and volume is 0.03 decimeters cubed?

  0.015 moles
• What is the molar ratio between potassium hydroxide and sulfuric acid in this reaction?

  2 to 1
• How do you find the number of moles of sulfuric acid from the moles of potassium hydroxide?

  By dividing the moles of potassium hydroxide by 2
• What is the number of moles of sulfuric acid if you have 0.015 moles of potassium hydroxide?

  0.0075 moles
• How do you calculate the concentration of sulfuric acid using the number of moles and volume?

  By dividing the number of moles by the volume
• What is the concentration of sulfuric acid if you have 0.0075 moles and a volume of 0.025 decimeters cubed?

  0.3 moles per decimeter cubed
• What are the steps to find the concentration of an unknown substance in a chemical reaction?


  1. Calculate the number of moles of the known substance.
  2. Use the molar ratio to find the moles of the unknown substance.
  3. Calculate the concentration of the unknown substance using its moles and volume.
• What units are used for concentration and volume in this context?

  • Concentration: moles per decimeter cubed (mol/dm³)
  • Volume: decimeters cubed (dm³)