CHEM 121 Lecture Notes - Lecture 18: Colloid, Soft Drink, Partial Pressure

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Air- oxygen and several trace gases are dissolved in the gaseous solvent, nitrogen. Alloys- brass and other homogenous metal mixtures in the solid state. General properties of liquid solutions: clear, transparent, no visible particles, may be colored or colorless, electrolytes are formed from solutes that are soluble ionic compounds, nonelectrolytes do not dissociate, volumes of solute and solvent are not additive. 1 l ethanol + 1 l water does not give 2 l of solution. Solutions and colloids: colloidal suspension- contains solute particles which are not uniformly distributed. Due to larger size of particles (1nm- 200nm) Appears identical to solution from the naked eye. Tyndall effect: tyndall effect- the ability of a colloidal suspension to scatter light. See a haze when shining light through the mixture. Degree of solubility: solubility- how much of a particular solute ca dissolve in a certain solvent at a specified temperature, factors that affect solubility: The polarity of the solute and the solvent.

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