Problem # 1 When 3.72 g dichloroethane is dissolved in 25 g of carbon tetrachloride, the boiling point raised from 76.5 oC. to 84.1 oC . The value of Kb for CCl4 is 5.03 oC/ m. Calculate the mass of the solute.
Problem # 1 When 3.72 g dichloroethane is dissolved in 25 g of carbon tetrachloride, the boiling point raised from 76.5 oC. to 84.1 oC . The value of Kb for CCl4 is 5.03 oC/ m. Calculate the mass of the solute.
Problem #2 How many grams of glycol ( C2H6O2 ), an antifreeze, must be added to 2 liters of water ( density of water = 1 g / mL) to lower the freezing point of water to – 10°C.
Problem #3 Five grams of sugar, C6H12O6. was dissolved in 100 g water. Find the vapour pressure of the solution if temperature is at 90° with vapour pressure of 524 torr.
Problem #4 80 grams of sucrose ( C12H22O11) were dissolved in 100 mL of water at 25°C. Find the vapour pressure of this solution at 25 °C?
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