CLEAPSS Supporting practical science and technology
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A relatively simple activity involving two vividly coloured cobalt(II) complexes in solution can be used to illustrate the effects of changing conditions (concentration, temperature) on a reaction at .. more
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Guidance on preparing, labelling and storing solutions of hydrochloric acid.
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Guidance on preparing, labelling and storing solutions of hydrogen peroxide.
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Guidance on preparing, labelling and storingsolutions of copper (II) salts, including copper sulphate, copper nitrate and copper chloride.
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This provides an opportunity to develop and practice colorimetric techniques, and to plot a calibration curve. 
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An alternative practical using lipase.
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Small scale 'disappearing cross' methods for investigating the effect of concentration on the rate of the sodium thiosulfate - acid reaction. Includes use of an alkaline 'stop-bath' to neutralise used.. more
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How prepare methanoic acid
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The activity described can be used as a class practical with KS4 students or as a demonstration with KS3. The energy changes involved can be comparedwith the concentration of the copper(II) sulfate(VI.. more
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This document contains:An outline of colorimetryThe principles of the CLEAPSS colorimeterUsing a CLEAPSS colorimeter which has been set upSetting up the CLEAPSS colorimeterproducing a calibration curv.. more
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