How do you prepare 250 ml 0.05 M CuCl2 solution from 0.1 M CuCl, stock solution? Lütfen birini seçin: a. By mixing 125 ml 0.1 M stock solution with 125 ml water b. By transferring 125 ml 0.1 M stock solution 500 ml volumetric flask and making up the mark with water c. By transferring 125 ml 0.1 M stock solution to 250 ml volumetric flask and making up the mark with water d. By transfergigg 250 ml 0.1 M stock solution to 1000 ml volumetric flask and making up the mark with water

How do you prepare 250 ml 0.05 M CuCl2 solution from 0.1 M CuCl, stock solution? Lütfen birini seçin: a. By mixing 125 ml 0.1 M stock solution with 125 ml water b. By transferring 125 ml 0.1 M stock solution 500 ml volumetric flask and making up the mark with water c. By transferring 125 ml 0.1 M stock solution to 250 ml volumetric flask and making up the mark with water d. By transfergigg 250 ml 0.1 M stock solution to 1000 ml volumetric flask and making up the mark with water

EBK A SMALL SCALE APPROACH TO ORGANIC L

4th Edition

ISBN:9781305446021

Author:Lampman

Publisher:Lampman

Chapter79: Solubility

Section: Chapter Questions

Problem 1P

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In fractional distillation, liquid can be seen running from the bottom of the distillation column back into the distilling flask. What effect does this returning condensate have on the fractional distillation?
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Although other solvents are available, dichloromethane(CH₂Cl₂) is still often used to “decaffeinate” drinks because thesolubility of caffeine in CH₂Cl₂ is 8.35 times that in water.(a) A 100.0-mL sample of cola containing 10.0 mg of caffeine is extracted with 60.0 mL of CH₂Cl₂. What mass of caffeine re-mains in the aqueous phase? (b) A second identical cola sampleis extracted with two successive 30.0-mL portions of CH₂Cl₂.What mass of caffeine remains in the aqueous phase after each extraction? (c) Which approach extracts more caffeine?
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