BIOL 1F90 Lecture Notes - Lecture 7: Ethylene Glycol, Solution, Boiling Point
27 Sep 2017
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Document Summary
The amount of dissolved solutes affects the physical properties of a solution. Solute concentration = amount of a solute dissolved in a unit volume of solution. 1g of nacl dissolved in 1 liter of water = 1g/l. Does not directly indicate how many molecules of each substance are present. E. g 10g of glucose contains fewer molecules than 10g of nacl. Number of moles dissolved per volume of solution is more informative. Properties of water that depend on the amounts of dissolved substances. Do not depend on the specific type of particle, only its concentration. E. g. temperature at which a solution freezes or vaporizes. Addition of solutes such as ethylene glycol to water. ***** any solute affects water in this way; decrease freezing point and increase boiling point**** Pure water has the ability to ionize to : Certain substances dissolved in water may release or absorb h+ or oh-, altering the concentrations. Molecules that release hydrogen ions in solution.
