Often the determination of the molar mass of a compound by...

Often the determination of the molar mass of a compound by osmotic pressure measurement is carried out at several different concentrations to get a more reliable average value. From the following data for the osmotic pressure of poly(methyl methacrylate) in toluene at $25^{\circ} \mathrm{C}$, determine graphically the molar mass of the polymer. [Hint: Rearrange Equation (12.8) so that $\pi$ is expressed in terms of $c$, which is the number of grams of the solute per liter of solution.] $$ \begin{array}{cccccc} \pi(\mathrm{atm}) & 8.40 \times & 1.72 \times & 2.52 \times & 3.23 \times & 7.75 \times \\ & 10^{-4} & 10^{-3} & 10^{-3} & 10^{-3} & 10^{-3} \\ c(\mathrm{~g} / \mathrm{L}) & 8.10 & 12.31 & 15.00 & 18.17 & 28.05 \end{array} $$

Often the determination of the molar mass of a compound by osmotic pressure measurement is carried out at several different concentrations to get a more reliable average value. From the following data for the osmotic pressure of poly(methyl methacrylate) in toluene at $25^{\circ} \mathrm{C}$, determine graphically the molar mass of the polymer. [Hint: Rearrange Equation (12.8) so that $\pi$ is expressed in terms of $c$, which is the number of grams of the solute per liter of solution.]
$$
\begin{array}{cccccc}
\pi(\mathrm{atm}) & 8.40 \times & 1.72 \times & 2.52 \times & 3.23 \times & 7.75 \times \\
& 10^{-4} & 10^{-3} & 10^{-3} & 10^{-3} & 10^{-3} \\
c(\mathrm{~g} / \mathrm{L}) & 8.10 & 12.31 & 15.00 & 18.17 & 28.05
\end{array}
$$

Thanks for your feedback!

Play audio

Feedback

Please give Ace some feedback