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5.1 Provide a detailed mechanism for the polymerization of styrene on treatment with BF3 in the presence of trace amounts of water. (6) 5.2

 

5.1 Provide a detailed mechanism for the polymerization of styrene on treatment with BF3 in the presence of trace amounts of water. (6) 5.2 Calculate the number average molecular weight for a polymer sample which consist of 12 moles of polymer molecules having molecular weight of 48,000 g/mol and 16 moles of polymer molecules having molecular weight of 36,000 g/mol. (3) 5.3 Describe the functionality of a lead storage cell. Use chemical equations and diagrams to illustrate your answer, where appropriate. (10) 5.4 (a) An analysis of drinking water showed that it contains 0.01 grams of chlorite per 650mL of water. Does this exceed the EPA drinking water standard? (b) How did this chemical contaminant enter the drinking water? (6)

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