Lecture on January 31st

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CHEM 101
Julian Tyson

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Chemistry 101 Lecture on January 31st, 2013 Reactions have two conditions; 1. Products escape, reaction goes until one of the reagents runs out (limiting reagent) 2. Products are continued, usually by solvent, so can undergo further reactions, including the reverse reactions, reactions then “stop” but has only stopped at the macro level At the molecular level, things are still happening. But rate of the forward reaction equals the rate of the reverse reaction. The overall combinations of the chemicals do not change. The reaction has reached equilibrium. Charges must balance as well as atoms, aka we need to account for the electrons (must be same on both sides) atoms have lots of electrons, so easier to count the positive changes (missing electrons). Every molecule of compound has a fixed atomic composition. A mixture is more than one compound and so can have a variety of comp
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