Design an experiment to separate a mixture of Aluminum nitrate (Al(NO3)3) and Caffeine. All nitrates are...

Design an experiment to separate a mixture of Aluminum nitrate (Al(NO3)3) and Caffeine. All nitrates are water soluble ionic compounds. Although caffeine is water soluble, it is ten times more soluble in an organic solvent like Methylene Chloride.

Solutions

Expert Solution

Aluminum nitrate is an ionic compound and is soluble in polar solvents.

Caffeine, on the other hand, is an organic compound and is soluble in organic solvents.

Here we will use Dichloromethane, an organic solvent for the separation of Aluminum nitrate and Caffeine. Caffeine has a high solubility of 140 mg/ml in dichloromethane.

When the mixture of Aluminum nitrate and Caffeine is dissolved in dichloromethane, the Aluminum nitrate is obtained as filtrate.

The mixture of dichloromethane and caffeine can be separated on the basis of the difference in densities of dichloromethane and water. Dichloromethane is insoluble in water and much denser than it.

The mixture gets separated into two layers - the upper layer is the caffeine layer and the bottom layer is the dichloromethane layer.

Drain the bottom layer into a conical flask and dry the combined dichloromethane solution with anhydrous Sodium sulfite.

Evaporate dichloromethane slowly.

When all the solvent is removed we get yellowish green - white crystalline residue of caffeine.

queen_honey_blossom answered 1 year ago

Next > < Previous

Related Solutions

The metathesis reaction between sodium hydroxide and aluminum nitrate is shown below 3NaOH(aq)+ Al(NO3)3(aq) arrow Al(OH)3(s)+...

The metathesis reaction between sodium hydroxide and aluminum nitrate is shown below 3NaOH(aq)+ Al(NO3)3(aq) arrow Al(OH)3(s)+ 3 NaNo3(aq) How many grams of solid aluminum hydroxide can be produced by the reaction of 375.0ml of 0.400M sodium hydroxide solution with 250.0ml of 0.150M aluminum nitrate nitrate solution?

Cr(NO3)3(aq) + Al(s) ---- Al(NO3)3(aq) + Cr(s) balance the equation

You need to separate a mixture of caffeine and benzoic acid. The sample has an initial...

You need to separate a mixture of caffeine and benzoic acid. The sample has an initial weight of 2.00 g and a content of 25.0% caffeine. You use dichloromethane, 10.0% NaOH solution, and 10.0% HCl. You are able to isolate 0.60 g caffeine and 1.00 g benzoic acid. Complete the following calculations and show your work. i)Calculate the amounts of caffeine and benzoic acid in the initial sample. ii) How much 10% NaOH solution would be needed to neutralize all...

A cell is constructed using a piece of Al in a 1.00 M Al(NO3)3 solution and...

A cell is constructed using a piece of Al in a 1.00 M Al(NO3)3 solution and a piece of Cu submerged in a Cu(NO3)2 solution. Calculate the cell potential. Write the overall reaction. Which piece of metal gains mass and which loses mass? Which reaction occurs at the anode and which reaction occurs at the cathode? If the above cell was constructed using 0.250 M Al(NO3)3 and 0.300 M Cu(NO3)2, calculate the cell potential. Then calculate Delta G.

Lead (II) nitrate and aluminum chloride react according to the following equation: 3Pb(NO3)2 + 2AlCl3 →...

Lead (II) nitrate and aluminum chloride react according to the following equation: 3Pb(NO3)2 + 2AlCl3 → 3PbCl2 + 2Al(NO3)3. In an experiment, 8.00 g of lead nitrate reacted with 2.67 g of aluminum chloride. A. Which reactant was the limiting reagent? B. What is the theoretical yield of lead chloride? C. If 5.55 g of lead chloride is produced, what is the percent yield (actual amount of product divided by theoretical amount of product)?

Aluminum chloride, AlCl3, is made by treating scrap aluminum with chlorine. 2 Al (s) + 3...

Aluminum chloride, AlCl3, is made by treating scrap aluminum with chlorine. 2 Al (s) + 3 Cl2 (g) → 2 AlCl3 (s). If you begin with 6.73 g of aluminum and 31.43 g of chlorine, (a) Which reactant is the limiting reagent? (b) What mass of AlCl3 can be produced? (c) What mass of excess reactant remains when the reaction is completed?

1. Assuming that the formation of an aqueous solution of Al(NO3)3 is obtained by mixing solid...

1. Assuming that the formation of an aqueous solution of Al(NO3)3 is obtained by mixing solid Al(OH)3 and aqueous nitric acid . Write a balanced net ionic equation? 2. Which of the following combination will produce a precipitate? Pb(NO3)2 (aq) and HCl (aq) Cu(NO3)2 (aq) and KC2H3O2 (aq) KOH (aq) and HNO3 (aq) AgC2H3O2 (aq) and HC2H3O2 (aq) NaOH (aq) and Sr(NO3)2 (aq) 3 . In the following reaction, which species is reduced? Au(s) + 3NO3-(aq) + 6H+(aq)...

3) for one resonance structure of a nitrate(NO3-) provide the: a) Lewis structure b) formal charge...

3) for one resonance structure of a nitrate(NO3-) provide the: a) Lewis structure b) formal charge on each atom c)name of the electro pair(electron domain) geometry d) hybridization of the central atom e)name of the molecular geometry (shape)

Determine the initial concentration of Al in experiment #4. Include your units. 4 Al(g) + 3...

Determine the initial concentration of Al in experiment #4. Include your units. 4 Al(g) + 3 O2(g) ⟶ 2 Al2O3(g) Experiment # [O2]i, M [Al]i, M Initial Rate of Reaction, M/sec 1 0.10 0.20 4.80 x 10-3 2 0.30 0.20 4.35 x 10-2 3 0.30 0.40 8.70 x 10-2 4 0.20 ? 1.95 x 10-2 5 0.15 0.30

How do I prepare a 10ml mixture of 0.0200M Cr(NO3)3 and 0.0752M Co(NO3)2 if I have...

How do I prepare a 10ml mixture of 0.0200M Cr(NO3)3 and 0.0752M Co(NO3)2 if I have a stock solution of 25ml of 0.0500M Cr(NO3)3 and another stock solution of 25ml of 0.1880M Co(NO3)2?

Subjects