131.Solving a chemistry problem

131.Solving a chemistry problem

18. Determine the molecular weight of polymethylmethacrylate according to the following viscosimetric method:
 
Concentration of solution C, kg / m 3 1.0 1.2 1.4 1.6 1.8 2.0
The reduced viscosity of the solution of the polymer in benzene is η b / C
0.40 0.42 0.44 0.45 0.46 0.48
 
Constants: K = 4,7⋅10 -5, α = 0,77.

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