A general chemistry student isolated ciguatera toxin (a poisonous polyether produced by the dinoflagallete Gambierdiscus toxicus) from a red tide bloom off the coast of San Francisco, California. A partial structure of ciguatera toxin is shown below. The first steps in characterizing new substances typically involve determining physical properties. In a freezing point experiment, a 174.0 mg sample of pure ciguatera toxin was dissolved in 2.075 g of diphenylether (which has a freezing point = 26.8400 °C and a freezing point depression constant = 8.000 °C/m). The freezing point of the solution was observed to be 26.3302 °C. From this experiment, calculate the molar mass of ciguatera toxin.
Given, mass of solute = 0.174g
Mass of solvent = 0.002075Kg
∆T =T°-Ts = 0.5098°C
Kf = 8°C/m
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