5.4 Poly(ethylene glycol), PEG, is soluble in water. A series of tests were done to determine the average molecular weight of PEG by measuring the boiling point of solutions of PEG in water at different concentrations, as given below: C (g/dL) 0 (pure water) 0.062 0.148 0.370 0.623 Tb (°C) 100.00000 100.00015 100.00031 100.00052 100.00058 A. What is the repeat structure of PEG? B. Which type of average molecular weight is determined from the data given? C. What is the average molecular weight of this PEG sample?
5.4 Poly(ethylene glycol), PEG, is soluble in water. A series of tests were done to determine the average molecular weight of PEG by measuring the boiling point of solutions of PEG in water at different concentrations, as given below: C (g/dL) 0 (pure water) 0.062 0.148 0.370 0.623 Tb (°C) 100.00000 100.00015 100.00031 100.00052 100.00058 A. What is the repeat structure of PEG? B. Which type of average molecular weight is determined from the data given? C. What is the average molecular weight of this PEG sample?
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Transcribed Image Text:5.4 Poly(ethylene glycol), PEG, is soluble in water. A series of tests were done to determine the average molecular weight
of PEG by measuring the boiling point of solutions of PEG in water at different concentrations, as given below:
C (g/dL)
0 (pure water)
0.062
0.148
0.370
0.623
Tb (°C)
100.00000
100.00015
100.00031
100.00052
100.00058
A. What is the repeat structure of PEG?
B. Which type of average molecular weight is determined from the data given?
C. What is the average molecular weight of this PEG sample?
Expert Solution
Step 1
Poly(ethylene glycol) (PEG) is a synthetic polymer.
Polymers have very large molecular weight as they are formed by the combination of several monomeric units. These monomeric units are interconnected by covalent bonds. Their exact molecular weight can not be determined directly because of the possibility of breaking of chains of monomeric units. So, different methods are used to determine the molecular weight of polymers.
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