You are busy carrying out an experiment when a classmate asks for your help. You
ID: 1008717 • Letter: Y
Question
You are busy carrying out an experiment when a classmate asks for your help. Your friend is holding up a reaction tube and seems confused about which layer is aqueous and which is organic. You are in the middle of a different experiment and you have no idea what is in the reaction tube. So you ask your friend about the solvent he has used for his experiment. Your friend says he thinks he used diethyl ether, but is not sure. He shows you the bottle from which he obtained the solvent, but the label seems to be faded. What can you do to help your friend very quickly solve the mystery about the aqueous and organic layers in the reaction tube? You are busy carrying out an experiment when a classmate asks for your help. Your friend is holding up a reaction tube and seems confused about which layer is aqueous and which is organic. You are in the middle of a different experiment and you have no idea what is in the reaction tube. So you ask your friend about the solvent he has used for his experiment. Your friend says he thinks he used diethyl ether, but is not sure. He shows you the bottle from which he obtained the solvent, but the label seems to be faded. What can you do to help your friend very quickly solve the mystery about the aqueous and organic layers in the reaction tube? You are busy carrying out an experiment when a classmate asks for your help. Your friend is holding up a reaction tube and seems confused about which layer is aqueous and which is organic. You are in the middle of a different experiment and you have no idea what is in the reaction tube. So you ask your friend about the solvent he has used for his experiment. Your friend says he thinks he used diethyl ether, but is not sure. He shows you the bottle from which he obtained the solvent, but the label seems to be faded. What can you do to help your friend very quickly solve the mystery about the aqueous and organic layers in the reaction tube?Explanation / Answer
To find what solvent he used, again from the solvent bottle you take some solvent and water, mixwell and observe the separation. both separate properly.you can smell organic, aqueous no smell. if he used diethyl ethar it will be the top layer in reaction mass, water layer will come down due to the denisty. diethyl ether denisty low comapare to the water (water density 1), if he used chlorinated solvents like dichloromethane, dichloro ethane, chloroform or CCl4 , then deinsity more than 1. this organic layer will come down, water layer (aqueous layer) will be top layer.
one more option you dont know dinsity of solvent, you can weigh the solvent to find the density. you take 100 ml of solvent, if the weight is less than 100 g then the density below 1 it will come top layer. if the weight is more than 100 g, density more than 1, it will come down layer. because you take water 100 ml, then weigh the weight 100 g. so density 1. as i explained above you can separate distill the solvent and submit for GC.
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