HDHS Trilogy C8 Checkpoint quiz: Rates and equilibrium
Quiz by Alexandra Gill
GCSE (AQA)
Combined Science: Trilogy (ARCHIVED)
English National Curriculum
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13 questions
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- Q1Select the correct definition for rate of reaction.How fast the reactants turn into productsWhat is formed at the end of a reactionHow much space a substance takes upHow much an object weighs60s5.6.1.2
- Q2Which would have the largest surface area?25 g of chalk powder25 g of chalk in two sticks25 g of chalk in 5 sticks25 g of chalk in a single stick60s5.6.1.3
- Q3Which reaction has the fastest rate?An explosionA cake baking in the ovenA sugar cube dissolving in a cup of teaAn iron bridge turning rusty60s5.6.1.2
- Q4Which is the correct equation for the reversible reaction of the dehydration/rehydration of copper sulfate?hydrated copper sulfate (blue) + water ⇌ anhydrous copper(II) sulfatehydrated copper sulfate (blue) ⇌ anhydrous copper(II) sulfate + waterhydrated copper sulfate (blue) + water → anhydrous copper(II) sulfatehydrated copper sulfate (blue) → anhydrous copper(II) sulfate + water300s5.6.2.1
- Q5Select the correct equation for calculating the average rate of a reaction.Rate = time/amount of reactant used (or product formed)Rate = amount of reactant used (or product formed) × timeAverage rate of reaction = quantity of reactant used (or product formed)/timeRate = amount of reactant used (or product formed)/volume60s5.6.1.1
- Q6Which change will decrease the rate of a chemical reaction?Reducing the pressure the reaction happens underUsing a powdered reactant instead of a lumpAdding a catalyst to the reactionHeating up the reaction mixture60s5.6.2.7
- Q7300s5.6.1.1
- Q8Which statement about the rate of reaction is correct?Particles are less likely to exceed the activation energy when heated.Increasing the surface area decreases the number of collisions that take place.Increasing the surface area does not affect the energy of the individual particles.Increasing the temperature does not affect the rate of reaction.60s5.6.1.3
- Q9Select the statement that correctly describes what happens to the rate each time the temperature of a reaction is increased by 10°C.The rate of reaction increases by a factor of ten.The rate of reaction triples.The rate of reaction remains constant.The rate of reaction doubles.60s5.6.1.2
- Q10A small marble chip was dissolved in acid and the volume of carbon dioxide gas recorded in the table below. Calculate the average rate for this reaction.8.0 cm3800 cm3/s8.0 cm3/s0.08 cm3/s300s5.6.1.3
- Q11Select the statement that correctly describes how catalysts affect the rate of a reaction.Catalysts speed up the rate of reaction by increasing the energy of the reacting particles.Catalysts speed up the rate of reaction by decreasing the number of collisions between particles.Catalysts do not affect the rate of a reaction.Catalysts speed up the rate of reaction by providing a reaction pathway that has a lower activation energy.60s5.6.1.4
- Q1260s5.6.2.5
- Q13120s5.6.2.3
