Question

What does CaCl2, MgSO4 or Na2SO4 do? How do you know if you have added enough...

What does CaCl2, MgSO4 or Na2SO4 do? How do you know if you have added enough to the organic layer? What must have occurred if you added MgSO4 to an Erlenmeyer flask containing a colorless solution and it all dissolved?

type do not write

Homework Answers

Answer #1

CaCl2 , MgCl2 or Na2SO4 all are used as a dehydrating agent or desiccant. They are generally used to remove residual water from organic solvent during work up.

If organic solvent contains water then the solvent have some cloudy nature and if you add the above salt, first the salts absorbs water molecules and the organic solvent become more transparent. This change can predict the water molecules are removed.

If you add MgSO4 to an Erlenmeyer's flask containing a colorless solution and it all dissolved then you can predict that the colour solution is water.

Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
Add 7.0 mL of N,N-dimethylaniline and 50 mL of dichloromethane (CH2Cl2, DCM) to a 400- mL...
Add 7.0 mL of N,N-dimethylaniline and 50 mL of dichloromethane (CH2Cl2, DCM) to a 400- mL beaker. Place the beaker in an ice-water bath. Add a magnetic stir bar and thermometer. Clamp the thermometer in place. Turn on the stirring motor. Add 1.1 equivalents of a solution (~1 M) of bromine (Br2) in DCM (already prepared in the hood) with a plastic disposable pipet. If the temperature of the solution rises above 25 °C stop adding bromine solution. Allow the...
How do you determine when enough NaOH solution has been added to just neutralize the KHC8H4O4?
How do you determine when enough NaOH solution has been added to just neutralize the KHC8H4O4?
1.Write a procedure for how you would determine the density of your Gak. Write your procedure...
1.Write a procedure for how you would determine the density of your Gak. Write your procedure as though a student new to chemistry was going to need to follow the directions in order to repeat your process . What equipment including size of equipment would you use? Step by step directions are a good idea. Be descriptive. (Assuming Gak is not water soluble.) 2.Could you determine if a substance was organic or inorganic if all you were told was that...
Q1:  You have 21.7 mL of a 0.9 M solution of A. How many moles of A...
Q1:  You have 21.7 mL of a 0.9 M solution of A. How many moles of A do you have? Q2: In a titration experiment, 9.3 mL of an aqueous HCl solution was titrated with 0.4 M NaOH solution. The equivalence point in the titration was reached when 9.5 mL of the NaOH solution was added. What is the molarity of the HCl solution? Q3: In the titration of HCl with NaOH, the equivalence point is determined a. from the point...
“Success in math does not depend on how many answers you know, but what you do...
“Success in math does not depend on how many answers you know, but what you do when you don’t know the answer” Give meaning to the quote with 100 words count.
How do you know if a stock is overvalued? Are retained earnings free? How does the...
How do you know if a stock is overvalued? Are retained earnings free? How does the popularity of mutual funds impact rights of shareholders? (500 words..only one question needs to be answered but more than one or all is fine as well)
1. What do you currently know about how “society” works? In your own opinion how does...
1. What do you currently know about how “society” works? In your own opinion how does society influence you? How do you influence society? 2. What are you hoping to learn about society, groups, cultures, etc. during this course? Again, be as specific as possible.
In the synthesis of aniline lab experiment, I have the following post-lab question which I do...
In the synthesis of aniline lab experiment, I have the following post-lab question which I do not know how to answer. Please help, be thorough, and please also describe any intermolecular forces at work. Thank you for your help and time. "If NaOH was not added to the solution, and you then extracted with methylene chloride, what layer/phase would the product be found in? Why?"
Below is the background info for the lab assignment. The 4 blank boxes are the questions...
Below is the background info for the lab assignment. The 4 blank boxes are the questions I would like answers too. The end point for the fine titration was 35.90 mL in the burette when the solution turned bright green again. And the coarse titration I got 35.36mL as the end point. 35.9 mL is exact in case you need that info. Thanks! Background In this lab, we will determine the amount of alcohol (ethanol), C2H5OH, in a commercial vodka...
What is the concentration of the Vitamin C standard solution that you are making? Using the...
What is the concentration of the Vitamin C standard solution that you are making? Using the analytical balance in the instrument room, carefully weigh out about 125 mg of Vitamin C and place it in a 100-mL beaker in approximately 50 mL of water. It is not necessary for you to have exactly 125 mg, but it is important for you to know exactly how many mg you do have, and to make sure none of it is lost in...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT