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chemistry - Coggle Diagram
chemistry
rates of reaction
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effect of catalyst
a catalyst is a substance which increases the rate of reaction but does not tske place in the reaction, it provides an alternative pathway of lower activation energy meaning for more successful reactions
measuring gas volume
if a reaction produces a gas use a gas syringe to collect the gas over a period of time, again complete the reaction again with smaller marble chips and compare with a grapg, the smaller one produces more rapidly due to more surface area in contact with the solution
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measuring change in mass
reaction of marble chips/calcium carbonate and hydrochloric acid is used for this. record the loss in mass over a certain period of time at regular intervals then do the same but use smaller marble chips place your findings in a graph and compare
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reactions used
a metal with a dilute acid; zinc and dilute hydrochloric acid calcium carbonate with dilute hydrochloric acid. the catalytic decomposition of hydrogen peroxide solution.
planning investigation
make initial prediction, increase or decrease in certain things such as mass.make a fair test, one dependant variable one independant variable and the rest controls
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