Igcse Model Questions Vol1 2018 Chemistry Question 32
Practice objective / multiple choice question 32 from the 2018 Igcse Model Questions Vol1 Chemistry examination.
A step‑growth polymerisation is carried out using equimolar amounts of ethylene glycol \(\mathrm{C_2H_6O_2}\) (M = 62.07 g·mol⁻¹) and terephthalic acid \(\mathrm{C_8H_6O_4}\) (M = 166.13 g·mol⁻¹). The reaction mixture contains 0.5 mol of each monomer and 90% of the functional groups react.\n(a) Calculate the number‑average degree of polymerisation, \(DP_n\).\n(b) Using the repeat‑unit mass (monomer pair minus one water molecule), determine the theoretical mass of polymer obtained. Give your answers to three significant figures.
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This is Igcse Model Questions Vol1 2018 Chemistry Question 32. It is one of the objective questions from the 2018 Igcse Model Questions Vol1 Chemistry examination.
Difficulty level: Hard .
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