Kf constant for cyclohexane = 20.8 C/m
Now, we know
m = moles of quinone/mass of cyclohexane inKg = (1.29/M)/0.025 ( M is the molar mass of quinine)
3.30 = 20.8 x 1.29/(0.025xM)
M = 325.236 g/mol
If your Kf of cyclohexane is different put that and solve again...you will surely get correct answer...
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Quinine is a natural product extracted from the bark of the cinchona tree, which is native to South America. Quinine is...
Quinine is a natural product extracted from the bark of the cinchona tree, which is native to South America. Quinine is used as an antimalarial agent. When 3.33 g of quinine is dissolved in 25.0 g of cyclohexane, the freezing point of the solution is lowered by 8.55 "C. Look up the freezing point and Kf constant for cyclohexane in the Colligative Constants table. Calculate the molar mass of quinine. molar mass: 177.6 8/mol
Quinine is a natural product extracted from the bark of the cinchona tree, which is native to South America. Quinine is used as an antimalarial agent. When 0.950 g of quinine is dissolved in 25.0 g of cyclohexane, the freezing point of the solution is lowered by 2.44 ∘ C. Look up the freezing point and K f constant for cyclohexane in the Colligative Constants table. Calculate the molar mass of quinine.
Quinine is a natural product extracted from the bark of the cinchona tree, which is native to South America. Quinine is used as an antimalarial agent. When 0.950 g of quinine is dissolved in 25.0 g of cyclohexane, the freezing point of the solution is lowered by 2.44 ∘ C. freezing point and K f constant for cyclohexane is 20.8
Quinine is a natural product extracted from the bark of the
cinchona tree, which is native to South America. Quinine is used as
an antimalarial agent.
When 1.68 g of quinine is dissolved in 25.0 g of cyclohexane,
the freezing point of the solution is lowered by 4.31∘ C. The
freezing point and Kf constant for cyclohexane can be found
here.
Calculate the molar mass of quinine.
Solvent Formula Kf valueNormal freezing Kb value Normal boiling point (°C) 0.00 5.49...
Menthol is a crystalline substance with a peppermint taste and odor. When 0.705 g of menthol is dissolved in 25.0 g of cyclohexane, the freezing point of the solutionis lowered by 3.76 °C. The freezing point and Kf constant for cyclohexane can be found here. Calculate the molar mass of menthol.
Menthol is a crystalline substance with a peppermint taste and odor. When 0.966 g of menthol is dissolved in 25.0 g of cyclohexane, the freezing point of the solution is lowered by 5.15 °C. The freezing point and Kf constant for cyclohexane can be found here. Calculate the molar mass of menthol.
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