concentration

• What does concentration tell us?

  Mass of a solute in a given volume
• What is a solute?

  A chemical dissolved in a solvent
• What is often used as a solvent in chemistry?

  Water
• What is the unit of concentration for this definition?

  G per decimeter cubed
• What does "decim cubed" refer to?

  A unit previously called a liter
• How do you calculate concentration?

  Mass in grams divided by volume in dm³
• What is the concentration if 200 g of a chemical is dissolved in 1 dm³ of water?

  200 g per decimeter cubed
• What is the concentration if 150 g of a chemical is dissolved in 0.5 dm³ of water?

  300 g per decimeter cubed
• How do you calculate the mass of a solute needed for a concentration of 600 g per dm³ in 0.4 dm³?

  Multiply concentration by volume
• What is the mass needed to achieve a concentration of 600 g per dm³ in 0.4 dm³?

  240 g
• How do you calculate the final volume of a solution with 200 g of a chemical at 800 g per dm³?

  Divide mass by concentration
• What is the final volume of a solution containing 200 g at a concentration of 800 g per dm³?

  0.25 dm³
• How does increasing the mass of solute affect concentration?

  • Increases concentration if volume remains constant
• How does increasing the volume of solution affect concentration?

  • Decreases concentration if mass remains constant