Post a New Question

Chemistry

posted by .

I did a lab for Organic Chemistry

I did a simple distillation for an unknown and found that it boiled at 76 degrees.
I also found out that the unknown was ethanol since we knew what the 4 possibilities were and mine was closest to ethanol.

I also did a fractional distillation and only 4.0 ml were distilled off from the initial 25 ml solution.

I need to find beginning percent composition of the unknown/H2O assuming that the unknown doesn't form any azeotropes.

And also if it did form an azeotrope, calculate the beginning precent composition of the solution.

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. Distillation Lab Calculations

    I had to do a fractional distillation while my lab partner did a simple distillation. I had 2 unknown compounds which could have been any of the following: heptane, cyclohexane, toulene, octane, Well I think I went and boiled the solution …
  2. Chemistry

    I did a lab for Organic Chemistry We did a simple distillation of an unknown alcohol to determine the boiling point, which was found to be 74*C The four possibilities for the unknown were methanol, ethanol, 1-propanol and 2-propanol. …
  3. Chemistry - Please help!!

    I did a lab for Organic Chemistry We did a simple distillation of an unknown alcohol to determine the boiling point, which was found to be 74*C The four possibilities for the unknown were methanol, ethanol, 1-propanol and 2-propanol. …
  4. organic chem

    7. An unknown compound, C8H14, is optically active. Hydrogenation of the unknown yields 4-methylheptane. Ozonolysis of the unknown yields ethanol and 2- methylpropandial. Suggest a structure for the unknown consistent with the above …
  5. Chemistry

    When doing a simple distillation of ethanol-water, is the vapor pure ethanol or does it also contain water?
  6. Chemistry

    Mass of unknown solution=25.671 Mass ethanol =8.243 Assuming that prior experiments have shown the single-step extraction removes only 72.0 % of the ethanol, the mass of ethanol in your original unknown is 11.45 Mass percent ethanol …
  7. chemistry

    At 22 degrees Celsius and a pressure of 755 mm Hg, an unknown gas was found to have a density of 4.52 g/L. When analyzed, the gas was found to consist of two elements: Boron at 78.1% and Hydrogen at 21.9%. What is the molecular formula …
  8. Chemistry

    During a fractional distillation of a 25mL ethanol/H2O soln, it was found that first the temperature stayed constant at ~75 C for 3mL of soln, then it went up to 100 C for the rest of the soln. The first question is: Assuming that …
  9. Chemistry

    An aqueous solution containing 17.1 g of an unknown molecular compound ( nonelectrolyte) in 105.0g of water was found to have a freezing point of -1.8 degrees Celsius. What is the molar mass of the unknown compound?
  10. Organic Chemistry

    Hello! I was looking for some advice on my organic chemistry lab. We were supposed to separate and identify a solid mixed into a liquid. I found and have confirmed my liquid is acetone by distilling it out of the solid. The solid then …

More Similar Questions

Post a New Question