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RATES

1. Demonstrate knowledge and understanding that the rate of a reaction may be determined by measuring the loss of a reactant or gain of a product over time 

2.    Suggest appropriate practical methods to measure the rate of a reaction and collect reliable data (methods limited to measuring a change in mass, gas volume or formation of a precipitate against time) for the reaction of:
•    metals with dilute acid;
•    calcium carbonate/marble chips with dilute hydrochloric acid;
•    catalytic decomposition of hydrogen peroxide; and
•    sodium thiosulfate with acid (equation not required);

2.    interpret experimental data quantitatively, for example drawing and interpreting appropriate graphs to determine the rate of reaction; and
 

3.  Describe and explain the effects on rates of reaction when there are changes in:

•    temperature;

•    concentration;

•    frequency and energy of collisions between particles; 

•    changes in particle size in terms of surface area to volume ratio.

4.    demonstrate knowledge and understanding that
a catalyst is a substance which increases the rate of a reaction without being used up and recall that transition metals and their compounds are often used as catalysts;
5.    explain catalytic action in terms of providing an alternative reaction pathway of lower activation energy;

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