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Week 19 Year 11 Rates of Reaction 2

Last updated about 1 year ago
5 questions
1

The rate of a reaction between hydrochloric acid and calcium carbonate can be increased by heating the solution. Explain why, using ideas about collisions between particles.

2

The graph shows the volumes of carbon dioxide given off when marble chips are reacted with hydrochloric acid in five different experiments.
Curve A shows the volume of carbon dioxide given off when some marble chips are reacted with an excess of 1.0 mol/dm3 hydrochloric acid.
Explain which curve, B, C, D or E, could represent the results obtained if half the mass of marble chips is used with excess of the acid.

1

Suggest a suitable piece of apparatus for collecting the carbon dioxide in this experiment.

1

Explain, in terms of the particle collision theory, why the rate of reaction decreases over time.

Catalysts are used to ____ __ a reaction to increase the rate at which a product is made or to make a process ________. They are not normally ___ __ in a reaction and they work by lowering the ______ energy needed for the reaction, providing a different _______ for the reaction to follow.
An example of a catalyst is a biological catalyst called an _______.

Words – activation, enzyme, speed up, used up, cheaper, pathway
1

Type the words in the order they should be used.