rates of reactions worksheet
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Rates of Reaction Worksheet
Paper 032 Jan 2014
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Paper 032 June 2013
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Paper 2 May/June 2013
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Paper 2 Jan 2013
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Paper 2 May/June 2012
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Paper 2 Jan 2012
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Paper 2 Jan 2009
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The diagram below shows the volume of hydrogen produced over a period of time when 4 g of
calcium pellets are carefully added to an excess of dilute hydrochloric acid at 25oC. Draw on the
diagram the curve you would expect if the experiment was repeated at the same temperature with
(a) 4 g of calcium pellets but with excess acid of half the concentration of the original acid. Label
this curve A.
(b) excess acid of the original concentration but with 4 g of powdered calcium. Label this curve
B.
(c) Calculate the volume of hydrogen gas evolved at 25oC for the experiment performed in part
(b).
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