Question

In the recrystallization of p-dibromobenzene, why does the solution eventually turn cloudy upon addition of water?

In the recrystallization of p-dibromobenzene, why does the solution eventually turn cloudy upon addition of water?

Science   Chemistry   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1

In the recrystallization process water-ethanol mixture is used.

We know that polar compound dissolve in polar solvent and nonpolar dissolves in nonpolar solvents. But for recrystallization mixed solvents which are miscible in each other are used.

During recrystallization of p-dibromobenzene when water is added to solution hydration shells are formed as our solute (in our case p-dibromobenzene) is not soluble in water at room temperature.

Even though water-ethanol are miscible, hydration/solvation shells will form due to p-dibromobenzene and they appear as if it cloudy.

0 0
Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
Why do crystals of diphenytlacetylene form upon addition of water?
Why do crystals of diphenytlacetylene form upon addition of water?
First, you observe the reaction of SbCl3 and distilled H2O to be a cloudy white solution....
First, you observe the reaction of SbCl3 and distilled H2O to be a cloudy white solution. You then add HCl and the solution becomes clear. 1. Did the addition of HCl favor the products or reactants? Did the relative concentrations of SbCl3, H2O, and SbOCl increase or decrease? Justify yout answer. Next, you add distilled water to the same solution and it becomes cloudy and white again. 2. How does the addition of H2O affect the equilbirum? How did the...
Does the alkalinity of a water sample increase, decrease or stay constant upon addition of the...
Does the alkalinity of a water sample increase, decrease or stay constant upon addition of the followings? (a) H2SO4 (b) KOH (c) K2CO3 (d) KHCO3 (e) K2SO4
Why does recrystallization of a compound usually result in its purification? A. The growing crystal lattice...
Why does recrystallization of a compound usually result in its purification? A. The growing crystal lattice self-selects for that compound's molecules; impurities remain behind in the solution and are removed by filtration. B. Crystalline compounds are more pure than amorphic compounds by definition. C. Mechanical agitation of the boiling mixture physically separates the solute from its impurities by friction. D. Impurities are chemically destroyed by solvolysis.
If p-nitroacetanilide is hydrolysed in acidic solution, why does hydrolysis not take place during the nitration...
If p-nitroacetanilide is hydrolysed in acidic solution, why does hydrolysis not take place during the nitration with HNO3 and H2SO4.
1. Why does sodium benzoate dissolve so well in water, whereas benzoic acid does not? 2....
1. Why does sodium benzoate dissolve so well in water, whereas benzoic acid does not? 2. Explain how the two compounds (benzyl alcohol and benzoic acid) partition between ether and a NaOH solution in the manner that they do. HINT: Why are they soluble in the layers that they are in, and not the other?
Why would you suspect that starch does not easily dissolve in water at room temperature? a....
Why would you suspect that starch does not easily dissolve in water at room temperature? a. Starch is too large to easily go into solution b. the starch molecule has no kinetic energy because of its helical shape and therefore cant easily go into solution c. starch is too hydrophilic to easily go into solution d. starch is too hydrophobic to easily go into solution
Problem set for Competitive Nucleophiles 1) Why does water always enter the bottom of the condenser...
Problem set for Competitive Nucleophiles 1) Why does water always enter the bottom of the condenser and exit from the top? 2) Why are boiling stones added to the solvent undergoing reflux? 3) Why are any large clumps of ammonium salts broken down into a powder? 4) Why is it necessary to perform the competing nucleophiles reactions under acidic conditions? 5) Which is the better nucleophile, fluoride or iodide ion? Explain this in the terms of the nature of the...
Why does the infinity reaction not require an infinite amount of time? PROCEDURE: Prepare 60 mL...
Why does the infinity reaction not require an infinite amount of time? PROCEDURE: Prepare 60 mL of a 1:1 (by volume) solution of distilled water and 2-propanol in a beaker. Be as precise as possible. After mixing well, wait 10-15 minutes to allow the contents to come to room temperature as some heat will evolve during the mixing of the two liquids. Obtain ~20 mL of 0.05M NaOH and put it in a small plastic storage bottle. Set up a...
What role could the governance of ethics have played if it had been in existence in...
What role could the governance of ethics have played if it had been in existence in the organization? Assess the leadership of Enron from an ethical perspective. THE FALL OF ENRON: A STAKEHOLDER FAILURE Once upon a time, there was a gleaming headquarters office tower in Houston, with a giant tilted "£"' in front, slowly revolving in the Texas sun. The Enron Corporation, which once ranked among the top Fortune 500 companies, collapsed in 2001 under a mountain of debt...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT