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- Each of the student statements below is wrong. Explain why they are not correct. (a) All my compound dissolved right away in the small amount of solvent I added at room temperature, and I didn’t need to heat it at all. This means I’m going to get lots of pure compound out. (b) I did a recrystallization of naphthalene and my percent recovery was very high (99%), so I must have pure product. (c) When you’ve dissolved all your compound in hot solvent, and you’re in a hurry, it’s ok to just place it straight into the ice bath.Suppose you have an organic sample X that is somewhat soluble in water, even though it issomewhat more soluble in dichloromethane or ether solvents. But if you do a singleextraction, you get only 60% of your material to transfer from the water to the organic layer.How many “washes” would it take to extract over 90% of your organic material extracted fromthe water layer?Melting point: 98-105 Percent yield: 60% did you successfully make pure product? Explain.
- When performing arecrystallization, slocent with a boiling point less must be use than the melting point of the compound being recrystallized. For benzil ( m.p.94-95C) which solvent would be best for this recrystallization? toluene (b.p. 110C) H2O (b.p.100 C) ethane( bo -98) methanol(bp64.7)Please answer the question at the bottom, Thanks. LAB NOTES FOR PREPARATION OF BUTYL MAGNESIUM BROMIDEAND ITS SUBSEQUENT CONVERSION TO AN ALCOHOL To the reaction flask were added 2.5967 gram of magnesium turnings, about 20 mlof diglyme, and a solution of 13.5942 gram of butyl bromide in about 25 mldiglyme.The procedure as per the lab manual was initiated. After the required heating timewas completed the reaction mixture was allowed to cool to room temperature.Then a solution of 6.1123 gram of acetone in about 15 ml of diglyme was addeddropwise as per the lab manual.The rest of the lab manual procedure was completed, ultimately affording 2.5532gram of an oily, clear and slightly yellow liquid, presumed to be 2-methyl-2-hexanol. Boiling point as measured by distillation was 138 – 141 deg C.About 0.8 ml of the presumed 2-methyl-2-hexanol was placed in an NMR tube towhich was added 2 drops of TMS. The tube was capped, then inverted and righted20 times to thoroughly mix the product and…Please answer the question at the bottom, Thanks. LAB NOTES FOR PREPARATION OF BUTYL MAGNESIUM BROMIDEAND ITS SUBSEQUENT CONVERSION TO AN ALCOHOL To the reaction flask were added 2.5967 gram of magnesium turnings, about 20 mlof diglyme, and a solution of 13.5942 gram of butyl bromide in about 25 mldiglyme.The procedure as per the lab manual was initiated. After the required heating timewas completed the reaction mixture was allowed to cool to room temperature.Then a solution of 6.1123 gram of acetone in about 15 ml of diglyme was addeddropwise as per the lab manual.The rest of the lab manual procedure was completed, ultimately affording 2.5532gram of an oily, clear and slightly yellow liquid, presumed to be 2-methyl-2-hexanol. Boiling point as measured by distillation was 138 – 141 deg C.About 0.8 ml of the presumed 2-methyl-2-hexanol was placed in an NMR tube towhich was added 2 drops of TMS. The tube was capped, then inverted and righted20 times to thoroughly mix the product and…
- Benzillic Acid Lab Q3. Cold water and ethanol was used to wash/rinse the collected solid during vacuum filtration. Why should the water and ethanol be cold?Draw a FIVE STEP Schematic diagram of the procedure on how to separate pure crystals of CuSO4 , Alum and Benzoic acid. (Draw only ONE schematic diagram for the three samples)1.Each of the student statements below is wrong. You will need to explain why they are not correct. (a) All my compound dissolved right away in the small amount of solvent I added at room temperature, and I didn’t need to heat it at all. This means I’m going to get lots of pure compound out. (b) I did a recrystallization of naphthalene and my percent recovery was very high (99%), so I must have pure product. (c) When you’ve dissolved all your compound in hot solvent, and you’re in a hurry, it’s ok to just place it straight into the ice bath.
- for the following, should i use fractional or simple distillation? separation of 1-butanol (Tb = 116 oC) from ethanol (Tb = 78 oC).?C. PARAFFIN1. Place a paraffin about the size of a rice grain in a dry test tube. Warm gently andadd e drops of bromine (CAUTION!). Result: ____________________________________2. Melt a small piece of paraffin in a dry test tube and add 3 drops of potassiumpermanganate solution. Result: _______________________________________________What does this prove? ________________________________________________________D. LPG (Liquefied Petroleum Gas)CAUTION: No flame must be lighted in this portion.Attach a glass nozzle to a rubber tubing and connect this to the gas outlet.Prepare 2 test tubes containing 1 mL of each alkaline potassium permanganateand bromine water. Slowly open the gas cock and bubble the gas for one minuteinto each tube. Property of and for the exclusive use of SLU. Reproduction, storing in a retrieval system, distributing, uploading or posting online, or transmitting in any form or by anymeans, electronic, mechanical, photocopying, recording, or otherwise of any part of this…Neel’s unknown solid 1) dissolves in hot ethanol, 2) is essentially insoluble in hexane, and 3) is insoluble in cold water, but sparingly soluble in warm water. Outline a recrystallization procedure.