Reserpine is a natural product isolated from the roots of the shrub Rauwolfia serpentina. It was first synthesized in 1956 by Nobel Prize winner R. B. Woodward. It is used as a tranquilizer and sedative. When g reserpine is dissolved in g camphor, the freezing-point depression is ( for camphor is ). Calculate the molality of the solution and the molar mass of reserpine. Answer mol/kg;

Explanation:

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" Reserpine is a natural product isolated from the roots of the shrub Rauwolfia serpentina. It was first synthesized in 1956 by Nobel Prize winner R. B. Woodward. It is used as a tranquilizer and sedative. When 1.00 g reserpine is dissolved in 25.0 g camphor, the freezing-point depression is 2.63 °C (Kf for camphor is 40 °C·kg/mol). Calculate the molality of the solution and the molar mass of reserpine. "

The freezing-point depression is expressed by:

We put the data given by the problem and solve for m:

For the calculation of the molar mass: Molality is defined as moles of solute per kilogram of solvent:

We calculate moles of reserpine:

Finally we use the mass of reserpine and the moles to calculate the molar mass:

Keep in mind that if the data in your problem is different, the results will be different. But the solving method remains the same.

it can be icreased by increasing pressure.