Gce Model Questions Vol1 2022 Chemistry Question 37
Practice objective / multiple choice question 37 from the 2022 Gce Model Questions Vol1 Chemistry examination.
A polymer solution at 25 °C has an intrinsic viscosity \([\eta]=0.85\) dL g\(^{-1}\). The polymer obeys the Mark-Houwink relationship \([\eta]=K\,M^{a}\) with \(K=1.5\times10^{-4}\) dL g\(^{-1}\)(g mol\(^{-1}\))\(^{-a}\) and \(a=0.75\). Determine the weight‑average molecular weight \(M_{w}\) of the polymer (expressed in g mol\(^{-1}\)). Then state whether the polymer meets a specification that requires \(M_{w}>2.0\times10^{5}\) g mol\(^{-1}\).
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This is Gce Model Questions Vol1 2022 Chemistry Question 37. It is one of the objective questions from the 2022 Gce Model Questions Vol1 Chemistry examination.
Difficulty level: Hard .
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