WEEK 14

• what is the effect on the concentration of a solution if the volume of water is increased?

  decreases
• what is the value of avogadro constant?

  6.02 X 10^23
• what are the units for concentration used using moles and working with solutions?

  mol/dm^3
• what is the law of conservation of mass?

  mass cannot be created or destroyed
• what is the effect on the concentration of a solution if the amount of solute is increased?

  it increases
• what are the 4 state symbols?

  (s) solid

  (l) liquid

  (g) gas

  (aq) aqueous
• what is the equation that links concentration, mass, and volume?

  concentration = mass / volume
• why does mass in chemical reactions sometimes appear to increase?

  because one of the reactants is a gas which is added to the products
• what is the unit of measurements used for chemical amounts?

  moles
• what is the equation that links moles, mass, and Mr

  moles = mass / Mr