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30 mL of methanol (density 0.7980 g/mL) ...

30 mL of methanol (density 0.7980 g/mL) on mixing with 70 mL of water (density 0.9984 g/mL) at 298 K gave a solution of density 0.9575 g/mL. Calculate (i) mole fraction, (ii) molality, (iii) molarity, and (iv) f.p. of the solution. `K_f(H_2O) = 1.86` .

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To solve the problem step by step, we will calculate the required values: mole fraction, molality, molarity, and the freezing point of the solution. ### Given Data: - Volume of methanol (V_m) = 30 mL - Density of methanol (d_m) = 0.7980 g/mL - Volume of water (V_w) = 70 mL - Density of water (d_w) = 0.9984 g/mL - Density of the solution (d_s) = 0.9575 g/mL ...
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Knowledge Check

  • When 10 mL of ehtyl alcohol (density = 0.7893 g mL^(-1)) is mixed with 20 mL of water (density 0.9971 g mL^(-1)) at 25^(@)C , the final solution has a density of 0.9571 g mL^(-1) . The percentage change in total volume on mixing is

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