ws2302key - CH302 Worksheet 2 Colligative Properties All of...

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CH302 Worksheet 2 Colligative Properties All of this is intended to be done without the aid of a calculator. All of the calculations are designed such that approximating should be straight-forward and produce a correct result. 1. Based on the physical constants involved, which colligative property has the greatest magnitude for a solution of a given concentration? Which can't be compared in this way? Why? Osmotic pressure - except at extremely low temperatures - the RT term is going to be much larger than the value of k b or k f . It is difficult to compare Raoult's Law in these terms because it uses no physical constants. 2. Which colligative properties have a linear concentration dependence? Write their equations. All colligative properties have a linear concentration dependence. Osmotic pressure ( Π = i·M·R·T) Boiling point elevation ( Δ T b = i· m ·K b ) Freezing point depression ( Δ T f = -i· m ·K f ) Vapor pressure lowering (P = P°·x) 3. Rank the following aqueous solutions in terms of increasing boiling point: 3
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ws2302key - CH302 Worksheet 2 Colligative Properties All of...

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