L9 Sp17p2 - Midterm exam grades and answer key are posted...

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1 Midterm exam grades and answer key are posted online Exam return TODAY from 1-3 pm in LS400 After today, exams will be in glassware room Regrade deadline is Friday (3/31) at 4:30 pm 0 10 20 30 40 50 60 70 80 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 170 180 190 200 Midterm Exam Grade Distribution Average: 141 Median: 144 High: 197 Homework Reminder: Quiz 7 Pre-lab 7 Help session today (5-6 pm in LS 250) Chem 152 Lecture 9 EXP 7 Chromatographic Separations You will learn : 1. Principles of chromatography as illustrated by ion- exchange chromatography . 2. Chromatogram —how is it obtained and how you can obtain quantitative information. 3. Spectrophotometric Analysis—as illustrated by analysis of Fe(III) and dichromate ions and accomplished by applying Beer-Lambert Law ( A = ε bc ). 4. Stoichiometric calculation involving dilution and mole- molarity conversion. Chromatography a method of separation based on the principle of phase distribution Stationary phase (solid particles, or liquid coating on solid particles) Different types of chromatographic separation methods: Paper Chromatography (stationary phase is a piece of paper) Thin Layer Chromatography (stationary phase is spread in thin layer) (Liquid or gas carrying the sample mixture) Column Chromatography (stationary phase is packed in a column) Gas Chromatography (mobile phase is a gas) Liquid Chromatography (mobile phase is a liquid)
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  • Spring '14
  • KITMAO
  • Chromatography, Exchange Chromatography, Cation exchange chromatography

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