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- 17. Which solvent mixture would be the most polar?a. 100% hexanesb. 90:10 hexanes/acetonec. 80:20 hexanes/acetoned. 50:50 hexanes/acetoneFilter paper Saturated KNO; solution 259 Figure 1. Experimental apparatus. Experimental Procedure Part 1. Copper and Zinc Metal 1) Select a piece of copper and a piece of zinc metal wire from the containers in the hood. 2) Clean the surface of the metal wires with the steel wool. Wipe clean with a dry paper towel. 3) Obtain a plastic well plate. Fill one well with 10 drops of the Copper ion solution from the dropper bottle. Label this well with a Sharpie marker so that you remember which solution you filled it with, 4) Repeat step 3 with Zinc ion solution. Select a well right next to the well in step 3 so that the two wells with Copper and Zinc ion solution are right next to each other. 5) Obtain a small dry strip of filter paper. You may have to cut a large piece of filter paper down to the appropriate size. It should be exactly this big C It's OK to tear the filter paper with your hands. Using the drop bottle, saturate the filter paper strip with KNO; solution. Gently place one end…Chemistry Which lab technique(s) can be performed on solid, somewhat soluble samples? Melting Range Determination or Recrystallization. Melting Range Determination. Not Recrystallization. Neither Recrystallization nor Melting Range Determination. Recrystallization. Not Melting Range Determination.
- What factor(s) will affect the magnitude of hysteresis of sorption isotherm?I. The nature of food.II. The rate of water removal.III. The amount of water removed during the drying process.IV. The temperature of the drying operation. a.I and II b. I only c. II, III and IV d. All of above13. How can you induce recrystallization in a solution? a. Scratch inside of beaker with glass rod b. Cool solution c. Seed the solution with pure compound d. Concentrate the solution to create supersaturation e. All of the above Your answer:Explain and answer properly in recrystallization, after the crystals have formed (with cooling on standing), the solution can be cool with ice. why is this done ? a) To get the impurities to crystallize as well b) Less product is needed to saturate cold solvent so the yeild is higher c) The impurities are more soluble in cold solvent
- Why is important to allow the saturated solution to cool down slowly during the recrystallization?For the liquid acetone, list all IMFs that have to be broken in order for it to mix with waterAfter a recrystallization, a pure substance will ideally appear as a network of Choose. Choose... . If this is not the case, it may be worthwhile to reheat the flask and allow the contents to cool more Choose...
- ………… is usually used only to separate liquids whose boiling points differ greatly or to separate liquids from involatile solids or oils. which option is correct?a. distillation b. simple distillation c. fractional distillationd. steam distillation e. vacuum distillation- Suppose your sample is mixed with other stuff that is not soluble in your recrystallization solvent. Whenfiltering, should you rinse with hot solvent or cold? Why? - Suppose you've isolated crystals of your sample and are now filtering them. Should you rinse with hotsolvent or cold? Why?Give clear detailed Solution..please avoid handwritten Solution