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Cards In This Set
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BASED ON WHAT PROPERTIES DOES LIQUID-LIQUID EXTRACTION USE TO SEPERATE MIXTURES?
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Seperates the two immiscible solvents based on solubility differences.
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WHAT ARE THE CHARACTERISITICS TWO SOLVENTS MUST HAVE IN ORDER TO SEPERATE VIA LIQUID-LIQUID EXTRACTION?
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I) They cannot be miscible with each other.
ii) First solvent should completely dissolve both compounds (can work with one compound suspended). iii) The second solvent should dissolve only one component. |
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WHAT IS THE PARTITION COEFFICIENT?
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- In an equilibrium state of the solute between the two solvents, the ratio of concentration between the two solvents are constant.
- This occurs after mixing the solute in the immiscible solvent. - The solute is still dissolve-able in both layers even though one is preferred. |
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WHAT ARE SOME METHODS FOR REMOVAL OF AN ORGANIC SOLVENT FROM THE DESIRED COMPOUND?
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1) Evaporation on steam bath or hot water bath.
2) Evaporation at reduced pressure. 3) Distillation 4) Evaporation by means of rotary evaporator. |
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WHAT IS THE CORRECT METHOD OF USING LITMUS PAPER TO TEST FOR ACIDITY OR BASICITY?
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Stir the solution with a glass rod and pull it up from the center of the solution and touch the litmus paper with the tip.
Never stick the litmus paper into the solution! |
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WHAT IS THE PARTITION COEFFICIENT?
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K = C2/C1
C1 is equilibrium concentration of solute A in solvent 1 C2 is equilibrium concentration of solute A in solvent 2 |
