GCSE Chemistry (Unit 2) Karteikarten am C2.4 Flashcards, erstellt von Mel Hughes am 28/08/2016.
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Erstellt von Mel Hughes
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What two types of measurement must be made to find the average rate of a reaction?
How can we use a graph of amount of product against time to tell us the rate of the reaction at a given time?
What do we call the minimum energy needed for the particles to react?
List the factors that increase the rate of a reaction
Why do powders react faster than large pieces of solid?
Why does a small change in temperature have a large effect on the rate of reaction?
Why do reactions in solutions go faster at higher concentrations?
Why does increasing the pressure increase the rate of a reaction of two gases?
Why can catalysts be used over and over again?
Why do different reactions need different catalysts?
What are the benefits of using catalysts in industrial processes?
Give one disadvantage of transition metal catalysts
What two areas of research offer possibilities for new or better catalysts?
How can you tell that burning natural gas is an exothermic reaction?
What are the two ways that show that a reaction is endothermic?
Why must blue copper sulphate be heated continuously to change it into anhydrous copper sulfate?
Why does adding water to anhydrous copper sulfate cause the mixture to get hot?
Suggest one advantage of a re-usable hand warmer compared with a single use hand warmer
Suggest one disadvantage of a re-usable hand warmer compared with a single use hand warmer
Suggest one advantage of a chemical cold pack compared with using an ice pack
Suggest one disadvantage of a chemical cold pack compared with using an ice pack
Pieces of zinc react with dilute hydrochloric acid
Zn(s) + 2HCl(aq) -> ZnCl2(aq)+H2(g)
In what ways could you increase the rate of the reaction between zinc and hydrochloric acid?
How can you find the rate of a reaction from a graph of mass of product against time?
What is meant by the 'activation energy' of a reaction?
Name two types of reaction that are exothermic
Why must calcium carbonate be heated continuously to convert it into calcium oxide and carbon dioxide?
Nitrogen and oxygen react together to produce nitrogen oxide:
N2(g) + O2(g) ->2NO(g)
What changes in conditions would increase the rate of this reaction?
Explain in terms of particles why increasing the concentration of a reactant increases the rate of the reaction
Explain why increasing the temperature increases the rate of a reaction
