CHM135H1 Lecture : Notes taken during lecture
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CHM135H1 Full Course Notes
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1. 45g (mol/342. 3g) / (30. 0ml)(1. 00g/mol)(kg/1000g) = 0. 141 mol/kg. Miscible = can be mixed together in any proportions network solids ex. diamonds insoluble in all solvents. Metals insoluble in liquid solvents; can dissolve in other metals ex. brass = zinc and copper ionic solids will dissolve if solvent has dipole-ion interactions strong enough. Molecular solids will dissolve in solvent with same type of intermolecular forces ex. glucose can h-bond with water. Ans3 gas solubility decreases pushing down forces gas molecules into liquid phase higher rate of gas dissolving means more liquid than changing into gas phase rate dissolving = rate into gas phase. (a) to (b), vapour pressure is lower. P of solution = x of water times p of water. 100. 0ml of water = (1. 00g/ml)(mol/18g) = 5. 56 mol water. 100. 0ml of ethylene glycol = (1. 15g/ml)(mol/62. 0g) = 1. 86 mol ethylene glycol. X of water = 5. 56 mol / (5. 56 mol + 1. 86 mol) = 0. 749.
