1. A laboratory requires 2000 cm° of an antifreeze solution consisting of 30 mol % methanol in water. What volumes of pure methanol and pure water at 25°C must be mixed to form the 2000 cm° of antifreeze also at 25C? The partial molar volumes for methanol and water in a 30% mol methanol solution and their pure species molar volumes both at 25°C are as follows: Methanol (1) V₁ =38.632 cm³/mol V₁-40.727 cm³/mol Water (2) V; ₂= 17.765 cm³/mol V₂ = 18. 068 cm³ /mol
1. A laboratory requires 2000 cm° of an antifreeze solution consisting of 30 mol % methanol in water. What volumes of pure methanol and pure water at 25°C must be mixed to form the 2000 cm° of antifreeze also at 25C? The partial molar volumes for methanol and water in a 30% mol methanol solution and their pure species molar volumes both at 25°C are as follows: Methanol (1) V₁ =38.632 cm³/mol V₁-40.727 cm³/mol Water (2) V; ₂= 17.765 cm³/mol V₂ = 18. 068 cm³ /mol
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1. A laboratory requires 2000 cm° of an antifreeze solution consisting of 30 mol% methanol in water.
What volumes of pure methanol and pure water at 25°C must be mixed to form the 2000 cm° of
antifreeze also at 25C? The partial molar volumes for methanol and water in a 30% mol methanol
solution and their pure species molar volumes both at 25°C are as follows:
Methanol (1) = 38.632 cm³/mol Vi = 40.727 cm³/mol
Water (2) V;
V2 = 17.765 cm³/mol V = 18 068 cm³/mot
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