Question
I have been thinking of ways to solve these problems but don't seem to know if I'm doing any of these right..Please help me step by step:
Continuously stir the lauric acid with a slight up and down motion of the thermometer. As the lauric acid tools, it will becomes more difficult to remove the thermometer. Discontinuing stirring once the lauric acid solidifies so as root too break the thermometer. Remove the thermometer from the solid lauric acid by remoting the lauric acid in the hot water bath. Reuse the melted lauric acid. Weigh out 1 gram of benzonic acid. Record the mass to the nearest thousandth of a gram. Add benazoid acid to your melted lauric acid and stir thoroughly. large test tube 2-400 ml. breakers thermometers box plate Lauric acid and benozonic acid are middly corresive acids. Handle with care. Weigh 5 kg of lauric acid. The freezing of pure lauric acid is: 43.0 degreeC The freezing point of lauric acid solution is: 30.0degreeC The depression in the freezing point is: deltaTK = K - m + I From the observed freezing point depression, calculate the appropriate molatity f the benzonic/laustic Calculate the experimental molaz mass of beazoinc acid fromes the number of molecules calculated above. The accepted molar mass of benzonic acid is: Using the actual molar mass and your experimental moler mass, Calculate the percent error of the molar mass of the benzinic acid.
Explanation / Answer
deltaf =Kf*molality
freezing pt of solvent(C6H6) -freezing pt of sol. = Kf *molality
