4 Problems
1 How much N2 can dissolve in water at 25'C if the N2 partial pressure is 585. Mm Hg?
2 Hexachlorophene is used in germicidal soalp. What is its molar mass if 0.640g of the compound, dissolved in 25.0 g of chloroform, produces a solution whose boiling point is 61.93 'C?
3 The enthalpy of solution of KClo3 in water is +41 kj/mol. Does the solubility of KClo3 increase or decrease as the temp increases?
4 Cigars are best stored in a "humidor' at 18'C and 55% relative humidity. This means the pressure of water vapor should be 55% of the vapor pressure of pure water at the same temp. The proper humidity can be maintained by placing a solution of glycerol [C3H5 (OH)3] and water in the humidor. Calculate the percentage by mass of glycerol that lowers the vapor pressure of water to the desired volume.
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