CHEM 1128Q Lecture Notes - Lecture 4: Molality, Colloid, Osmotic Pressure
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CHEM 1128Q Full Course Notes
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A solution is a homogeneous mixture that appears clear, like saltwater. A colloid has particles which are much larger but remain suspended, like milk. Changes in vapor pressure related to mole fractions. Rate = -delta[n2]/deltat = -delta[h2]/3deltat = delta[nh3]/2deltat. The rates are dependent on the stoichiometric ratios to one another: if n2 is 0. 10 moles/l-min, then h2 is 0. 3 moles/l-min, and nh3 is 0. 2 moles/l- min. It is possible to calculate the rate at a specific moment. Factors can affect the rate of reaction: temperature, concentration, presence of a catalyst. The rate of first order reactions gives a graph of a straight line: rate = k[a, k is a constant. 0 order reactions: rate = k, rate is independent of the concentration. Second order reaction: rate = k[a]2 or rate = k[a][b, two things need to react together for the reaction to happen so the rate is dependent on the concentration of both.
