Year 11 students, check the dates!
Chemical reactions can occur at vastly different rates. Whilst the reactivity of chemicals is a significant factor in how fast chemical reactions proceed, there are many variables that can be manipulated in order to speed them up or slow them down. Chemical reactions may also be reversible and therefore the effect of different variables needs to be established in order to identify how to maximise the yield of desired product. Understanding energy changes that accompany chemical reactions is important for this process. In industry, chemists and chemical engineers determine the effect of different variables on reaction rate and yield of product. Whilst there may be compromises to be made, they carry out optimisation processes to ensure that enough product is produced within a sufficient time, and in an energy-efficient way
Objectives. You should know:
Explain what is meant by the rate of a chemical reaction
Explain how to collect data on the rate of a chemical reaction
Explain how to calculate the mean rate of a reaction
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Objectives. You should know:
List the four factors that affect the rate of a reaction
Explain what collision theory is
Use collision theory to explain the effect of surface area on the rate of reaction
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Objectives. You should know:
Describe how changing temperature affects the rate of reaction
Use collision theory to explain this effect
Use a graph to calculate the rate of reaction at specific times in a chemical reaction (H)
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Objectives. You should know:
Describe how changing concentration affects the rate of reaction.
Describe how changing pressure affects the rate of gas phase reactions.
Use collision theory to explain how changing concentration or pressure alters the rate of reaction.
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Objectives. You should know:
Describe how adding a catalyst affects the rate of reaction.
Use collision theory to explain how adding a catalyst alters the rate of reaction.
Explain, with an example, the industrial use of a catalyst.
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Objectives. You should know:
Define a reversible reaction.
Describe a familiar reversible reaction in a balanced symbol equation.
Predict the observations of a familiar reversible reaction when the conditions are changed.
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Objectives. You should know:
Explain how changing conditions for a system at dynamic equilibrium affects the rate of the forward and reverse reaction.
Predict the effect on yield of changing temperature, concentration or pressure in a given equilibrium system.
Describe the effect of adding a catalyst to an equilibrium system.
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