Calculations
1. For each polymer solution, report the concentration, c (in gm PVOH per 100 mL of solution)
and the viscosity, η, you measured. This can be conveniently done in a table.
2. Always include uncertainties. Give estimates of:
• The relative uncertainty in each concentration, Δc/c. Is this a negligible error?
• The relative uncertainty in each viscosity.
3. Plot ηsp/c versus c for the uncleaved and the cleaved polymer. Give indications of error as
solid error bars on your graphs for each measurement, and report the values you plotted in
tabular form in the Results section.
4. From analyses of these plots obtain [η] for each material. Record the uncertainty limits on
[η] (obtained by propagation of uncertainty) in your Results section.
5. Calculate Mv and Mn for the original polymer and the degraded polymer. Always report
uncertainties with the values.
6. From the molar-mass results, obtain a value for Δ. Report this value and any uncertainty in
it.