Edexcel Jan 2012 Paper 4 Q18

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PMT 18 Kits for manufacturing biodiesel from vegetable oils and methanol are sold for home use. The reaction which takes place may be represented by the following equation. NaOH(s) 50(cid:113)(cid:38)(cid:15)(cid:3)(cid:28)(cid:27)(cid:8)(cid:3)(cid:92)(cid:76)(cid:72)(cid:79)(cid:71) 3CH3OH + CH2OOCR CHOOCR(cid:397) CH2OOCR(cid:398) CH2OH + RCOOCH3 CHOH + R(cid:397)COOCH3 CH2OH + R(cid:398)COOCH3 *(a) Describe any two of the main hazards when carrying out this reaction. What precaution would you take to minimise the risk in each case? (4) HazardPrecautionHazardPrecaution(b) Suggest two environmental benefits of using these kits, despite the associated risks. (2)(Total for Question 18 = 6 marks) *P39304A01124* 11 Turn over<br />

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