L21 - Stoichiometry vs. Equilibrium Lecture 21 Midterm 2...

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Lecture 21 Midterm 2 Review Key Idea: Reaching Equilibrium: Biological and chemical processes are dynamic and reversible, and the outcomes can be manipulated depending on conditions. Lectures 10, 11: Stoichiometric reactions (large K) Calculate the amount of product by stoichiometry. A + B " C 1 mole A plus 1 mole B yields 1 mole C Determine limiting reagent. Limiting reagent B: 2 moles A plus 1 mole of B yields 1 mole C Stoichiometry vs. Equilibrium K = [C] [A][B] Lectures 12, 13, 14: Introduction to equilibrium (K matters) Calculate the amount of product using equilibrium constant A + B ! C [C] = K [A][B] External conditions can change ratio. Adding lots of A results in a large [C]/[B] ratio Lectures 15, 16: Heterogeneous equilibrium Vapor pressure: liquid ! gas K p = p gas Gas solubility: aqueous ! gas K p = p gas /[aqueous] Solubility: MX K sp = s 2 MX 2 K sp = (s)(2s) 2 = 4s 3 Common ion: MX in a solution of X
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This note was uploaded on 04/03/2008 for the course CHEM 1A taught by Professor Nitsche during the Fall '08 term at Berkeley.

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L21 - Stoichiometry vs. Equilibrium Lecture 21 Midterm 2...

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