Partition coefficient between ether and water for caffeine is equal 7.2. The ini
ID: 1062764 • Letter: P
Question
Partition coefficient between ether and water for caffeine is equal 7.2. The initial concentration of caffeine in water is 2 times 10^-5 mol L^-1 of caffeine. What is the concentration of this solute in organic layer? Consider the following solvent pairs. If mixed together, which pars would form two layers? If they form two layers solvent would be on top (underline solvent which is on the bottom)? hexane and water; water and methylene chloride; hexane and methylene chloride, methanol and hexane; ethanol and water; acetone and toluene; toluene and water. Which conditions (3) are necessary for the colloid stabilization: The mechanical properties of the colloid are; (more than one answer is possible): The mechanical properties of the colloid are: Tyndall effect; electrophoresis; Brownian movement; electroosmosis diffusion sedimentation electrical double layer Student investigated the coagulation performance of various ions. To the test tube with albumin solution the copper chloride (CuCl_2, 1M/I, 5 mL) was poured. To the next test tube with albumin solution potassium chloride (KCl, 1M/I, 5 mL) was added. mixing solutions from test tubes with mentioned above inorganic solutions the coagulation wilt happened at test tube No...Explanation / Answer
Answers :-
33) What is concentration of solute in organiclayer ?
Ans- The Partition coefficient ( K ) = ( Conc. of solute in ether ) / ( Conc. of solute in water)
Using above eqation ,
Concentration of solute in organiclayer = The Partition coefficient ( K ) * ( Conc. of solute in water)
= (7.2) * ( 2 * 10 -5)
= 1.44 * 10 -4 moles per liter
34) Which solvent would be on top in the given pairs ?
Ans:- For each solvent Density is provided, The solvent which has more density remains at bottom & which has density less remains at the top.
Therefore the solvent which is at the bottom are :-
A) Water , B) Methylene Chloride , C) Methylene Chloride , D) Methanol , E) Water , F) Toluene , G) Water.
36) Ans:- The Mechanical properties of colloidal are related to the movement of particles which may be ,Brownian movement , Diffusion, & Sedimentation.