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31 Cards in this Set
- Front
- Back
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When are hot water baths used |
Evaporating volatile solvents Heating low boiling point liquids |
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When is a heating mantle used what must be used with this |
Heating explosive or flammable liquids |
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How to cool to 0-5 |
Ice and water |
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Cool to -20 |
Ice and sodium chloride |
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Cool to -55 |
Ice and calcium chloride |
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Cool to -75 |
Dry ice and acetone |
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Correction factor graph |
X) upper observed Y) correction factor |
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Calibration graph |
X mid observed Y mid literature |
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Boiling point correction factor |
760- atm / 10 *0.5 |
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How to measure Bp |
Find constant stillhead temp in simple distillation |
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Six factors effecting solubility |
Impurities Solvent and solute polarity Solute size Temp Pressure IM forces |
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Three drying agents |
Sodium sulfate Magnesium sulfate Calcium chloride |
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Three ways to classify chromatography |
Mechanism of retention Way compound is introduced and elutes Stationary phase |
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Two solid stationary phases |
Silica and alumina |
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Normal phase TLC |
Polar stationary phase and non polar mobile phase |
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Four factors effecting TLC rate |
Rate of elution Polarities Absorbent Ratio of compound to absorb any |
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Three ways to view TLC |
UV Zinc sulfate stain then UV Stain with potassium permangate or vanillin and heat |
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Three properties of good solvents for liquid liquid extraction |
Immiscible with phase to be extracted Low bp Dissolved wide organic range |
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Two common liquid to liquid extraction solvents |
Diethylether Dicholormwthane |
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Six ways to break up emulsion |
Swirl don’t shake Brine strengthens aq Let sit Gravity filter Prevent by removing solids Add alcohol acid or base |
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What needs to be added in fractional dist |
Fraction of column with steel wool |
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What is in a drying tube |
Calcium chloride |
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Adaptor in distillation |
Vacuum adaptor |
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What is norit |
Decolourizing carbon that removes impurities |
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What are salt plates made of |
Potassium chloride |
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Solvents for cast film |
DCM Chloroform |
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Fingerprint region |
1500-600 |
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Nujol perks and bad |
2 peaks blur CH Good for dissolving solvents that aren’t usually solvable |
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When does the Christiansen effect occur |
Crystal size similar to wavelength |
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IR solvent and where is its peak |
CDCl3 at 7.26 |
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It reference |
TMS |
