Calculating the Rate of Reaction

• What is the equation for calculating the mean rate of reaction?

  mean rate of reaction = amount of reactant used or product formed / time
• Explain how the rate of reaction can be found by measuring the amount of reactants used

  If one of the products is a gas , measure both the mass in grams of the reaction mixture before and after the reaction happens and the time it takes for the reaction to happen. The mass of the mixture will decrease (The units for rate of reaction may then be given as g/s)
• The amount of reaction used can be measured in g/s as well as moles
• As the reaction takes place, the reactant is used up , so the amount of reactant remaining decreases
• The concentration of the reactant is calculated as the amount (mol) divided by the volume of the reaction mixture (dm³). (Concentration is measured in mol/dm³)
• Explain how the rate of reaction can be found by measuring the amount of products formed?

  If one of the products is a gas, measure the total volume of gas produced in cubic centimetres with a gas syringe and the time it takes for the reaction to happen (The units for rate of reaction may be given as cm³/s)