Week 1 Material
Week 1 Material Chem 152
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This 4 page Class Notes was uploaded by AmitTal on Monday October 12, 2015. The Class Notes belongs to Chem 152 at University of Washington taught by Gabriele Varani in Summer 2015. Since its upload, it has received 16 views. For similar materials see General Chemistry in Chemistry at University of Washington.
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Date Created: 10/12/15
Acids Bases Buffers NOTE SU MMARY and Titration Objective Review on acids and bases learn about buffers and titrations What is a Bronsted Lowry acidbase BronstedLowry acids donate a proton H to a base Example CH3COOH is an acid that releases a proton to form CH3COO What is a strong acidbase Strong acids and bases ionize completely in water What are conjugate bases of strong acids The conjugate base of a strong acid is a very weak base Weak acids do not ionize completely Example I is the conjugate base of HI What are conjugate bases of weak acids The conjugate base of a weak acid is a very strong base that can ionize water Example CH3COO is the conjugate base of CH3COOH How to calculate pH of a 1 Balance the chemical equation weak acid and its 2 Write the ICE Initial Change conjugate base Equilibrium table for the reaction 3 Find X in terms of Ka 4 pH ogH30 How to calculate pH of a 1 Balance the chemical equation weak base and its 2 Write the ICE Initial Change conjugate acid Equilibrium table for the reaction 3 Find X in terms of Ka 4 pOH ogOH 5 pH 14pOH IMPORTANT KaKbKw1010quot14 What are common ion Composed of an acid and its conjugate base solutions This solution is subject to the common ion effect l The concentrations will constantly affect each other ICE tables still work with both acids and their conjugate bases added l Strong acids and bases always decrease in concentration What is a buffer solution A buffer solution prevents large changes in pH when a strong acid or base is added to it Why do buffer solutions work A weak acid HA is a better proton source then water so any OH is neutralized and replaced with A When are buffer solutions applicable Buffers are applicable when the concentration of OH or H is far inferior than the concentration of HA and A as mentioned above How do buffers respond to added OH ions The strong base reacts completely with the weak acid in the buffer the best proton source and the OH is replaced with A ions How do buffers respond to added H30 ions The strong acid reacts completely with the weak base A in the buffer the best proton acceptor and the H30 is replaced with HA
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