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3. State the methods you would use to determine the number-average molar mass Mn for the following polymers: (a)Samples of poly(ethylene glycol) with Mn values in the range 4 \times 10^2 to 5 \times 10^3 g mol$^{-1}$. (b)Samples of polyacrylonitrile with Mn values in the range 5 \times 10^4 to 2 \times 10^5 g mol$^{-1}$. In each case, give the reasons for your choice, name a solvent that would be suitable for the measurements, and discuss briefly possible errors in the determinations.

          3. State the methods you would use to determine the number-average molar mass Mn for the following polymers:
(a)Samples of poly(ethylene glycol) with Mn values in the range 4 \times 10^2 to 5 \times 10^3 g mol$^{-1}$.
(b)Samples of polyacrylonitrile with Mn values in the range 5 \times 10^4 to 2 \times 10^5 g mol$^{-1}$.
In each case, give the reasons for your choice, name a solvent that would be suitable for the measurements, and
discuss briefly possible errors in the determinations.

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3. State the methods you would use to determine the number-average molar mass Mn for the following polymers:
(a)Samples of poly(ethylene glycol) with Mn values in the range 4 ×10^2 to 5 ×10^3 g mol^-1.
(b)Samples of polyacrylonitrile with Mn values in the range 5 ×10^4 to 2 ×10^5 g mol^-1.
In each case, give the reasons for your choice, name a solvent that would be suitable for the measurements, and
discuss briefly possible errors in the determinations.

Added by Ryan S.

Chemistry: Structure and Properties

Nivaldo Tro 2nd Edition

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Solved by Expert Adi S

10/30/2023

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GPC/SEC separates polymers based on their size in solution, allowing for the determination of the molar mass distribution. Show more…

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State the methods you would use to determine the number-average molar mass Mn for the following polymers: (a)Samples of poly(ethylene glycol) with M_(n) values in the range 4 imes 10^(2) to 5 imes 10^(3)gmol^(-1). (b)Samples of polyacrylonitrile with M_(n) values in the range 5 imes 10^(4) to 2 imes 10^(5)gmol^(-1). In each case, give the reasons for your choice, name a solvent that would be suitable for the measurements, and discuss briefly possible errors in the determinations. discuss briefly possible errors in the determinations. In each case, give the reasons for your choice, name a solvent that would be suitable for the measurements, and (b)Samples of polyacrylonitrile with Mn values in the range 5 x 10 to 2 105 g mol-1. (a)Samples of poly(ethylene glycol) with M, values in the range 4 102 to 5 103 g mol-1. 3. State the methods you would use to determine the number-average molar mass Mn for the following polymers:

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