increases the rate of reaction for a given mass of a solid reactant. 4.7.4.3 According to collision theory, Explain the effects on 0.5 Describe collision theory. Required practical 19: Video clips: chemical reactions can occur rates of reaction of investigation of how Use collision theory to explain YouTube: only when reacting particles changes in changes in the change in rate of reaction YouTube: collide with each other and temperature, concentration affect the in terms of particle behaviour with sufficient energy. The concentration and of reactions by a for: minimum amount of energy pressure in terms of method involving concentration that particles must have to the frequency and measuring the volume pressure react is called the activation energy of collision of a gas produced and a surface area energy. between particles. method involving a temperature change in colour or catalyst. turbidity. This should be an investigation involving developing a hypothesis. Chemistry AT 1, 3, 5 and 6. 4.7.4.3 Increasing the concentration Explain the effects on 0.5 WS 1.2 clips: cont. of reactants in solution, the rates of reaction of pressure of reacting gases changes in
increases the rate of reaction for a given mass of a solid reactant. 4.7.4.3 According to collision theory, chemical reactions can occur only when reacting particles collide with each other and with sufficient energy. The minimum amount of energy that particles must have to react is called the activation energy. Explain the effects on rates of reaction of changes in temperature, concentration and pressure in terms of the frequency and energy of collision between particles. 0.5 Describe collision theory. Use collision theory to explain the change in rate of reaction in terms of particle behaviour for: concentration pressure surface area temperature catalyst. Required practical 19: investigation of how changes in concentration affect the of reactions by a method involving measuring the volume of a gas produced and a method involving a change in colour or turbidity. This should be an investigation involving developing a hypothesis. Chemistry AT 1, 3, 5 and 6. Video clips: YouTube: YouTube: 4.7.4.3 cont. Increasing the concentration of reactants in solution, the pressure of reacting gases Explain the effects on rates of reaction of changes in 0.5 WS 1.2 clips: