OCR A AS Specimen Paper 1 Q23

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23 A student carries out the following experiment to investigate the reaction between hexane and chlorine. The chlorine is made by reaction of aqueous sodium chlorate(I) with dilute hydrochloric acid. 22 (i) The reaction between aqueous sodium chlorate(I) and dilute hydrochloric acid produces Observations The mixture forms two colourless layers. The acid mixes with the lower layer, which turns a pale green colour. The pale green colour moves to the upper layer, leaving the lower layer colourless. The pale green colour slowly disappears leaving two colourless layers after about 10 minutes. Procedure 1 cm3 of hexane is mixed with 1 cm3 dilute aqueous sodium chlorate(I) in a test-tube. 1 cm3 dilute hydrochloric acid is slowly added to the mixture. The tube is then stoppered and shaken. The tube is placed under a bright light and shaken at regular intervals for about 10 minutes. The stopper is loosened regularly to release any pressure. aqueous sodium chloride as well as chlorine. Suggest an equation for this reaction. SPECIMEN lower layer, and give the expected result. of the experiment. test:result:(ii) Outline a simple practical test that would confirm the presence of chloride ions in the (a) [2] [2] [1] (iii) Name the apparatus that could be used to separate the two liquid layers present at the endOCR 2014 H032/01<br /> 23 (b) The reaction of hexane with chlorine took place when the bright light was switched on. (i) Give the skeletal formula of one possible organic product of this reaction. [1] (ii) Explain why this type of mechanism is likely to produce a mixture of organic products.[1] SPECIMENOCR 2014 H032/01 Turn over<br />

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