Explain the overall percent recovery for the three step

Assignment Help Chemistry
Reference no: EM13130496

Benzoin to Hexaphenylbenzene lab questions.

Benzoin to Hexaphenylbenzene

There are 4 questions to answer.

Please determine the percentage yield for each of the three steps in the reaction and determine the overall percent recovery for the three step process.

The data is as follows:

In the 1st step of the synthesis benzoin is oxidized to benzil.

Add 0.25 millimoles of copper II acetate monohydrate and 0.013 moles of ammonium nitrate to a flask containing 3.5 mL of water. Warn the mixture. Cool the mixture then add 14 mL of glacial acetic acid and 0.014 moles of benzoin to the flask. Reflux the mixture then cool the mixture. Add 15 g of ice to the mixture then recyrstalize the crude product.

Question 1 The weight of the product (benzil) for this part of the reaction was 2.03 g. What is the percentage yield?

In the second step the benzil under goes aldol condensation to form tetraphenylcyclopentadienone.
Dissolve0.16 grams of KOH in 25 mL of ethanol add 6.0 milimoles of benzil followed by 6.0 millimoles of diphenyl acetone. Reflux then cool the vacuum filter to collect the tetracyclopentadienone product. Wash the product with 8 mL of cold water then 8 mL of ethanol.

Question 2 The weight of the product (tetraphenylcyclopentadienone) for this part of the reaction was 2.34 g. What is the percentage yield?

In the third and final step tetraphenylcyclopentadienone and diphenyl acetylene are refluxed and the final product is hexaphenlybenzene.
Add 1.3 millimoles of tetraphenylcyclopentadienone and 1.8 millimoles of diphenyl acetylene to a test tube. Heat the mixture and allow the mixture to reflux. Cool the mixture and add 5 mL of petroleum ether. Warm the mixture then cool the mixture collect the product (Hexaphenylbenzene) by vacuum filtration.

Question 3 The weight of the product (Hexaphenylbenzene) for this part of the reaction was 2.04 g. What is the percentage yield?

Question 4 What is the overall percent recovery for the three step process?

Reference no: EM13130496

Questions Cloud

Percentage unused avaliable labor-exponential distribution : A certain service station uses a team of 3 mechanics in one repair station to work on each car that needs repair. This team can repair cars at a rate of 9 per day.
Effective outline for presentation : What six stages should you go through in preparing an effective outline for presentation? Explain the reasons why each stage is necessary.
What quantity of heat, in joules, is required : The specific heat of silver is 0.235 J/g·K. Its melting point is 962°C, and its heat of fusion is 11.3 kJ/mol. What quantity of heat, in joules, is required to change 7.50 g of silver from solid at 25°C to liquid at 962°C?
Discuss the potential risks of adopting lean production : Discuss the potential risks of adopting lean production. Does its application depend on company culture and business condition?
Explain the overall percent recovery for the three step : The weight of the product (Hexaphenylbenzene) for this part of the reaction was 2.04 g. What is the percentage yield? What is the overall percent recovery for the three step process?
Find the probability that single fisherman-s catch less fish : what is the probability that a single fisherman's catch is less than 31.5 pounds? what is the probability that the sample of 30 fisherman's average catch is less than 31.5 pounds?
Calculate the solubility-product constant ksp : Consider the solubility information BaSO4 = 3.4 ×10 -4  g 100 g H2O at 20 ?C.Calculate the solubility-product constant Ksp
How would you recommend the service department costs : Surf Beach State College (SBSC) has a business school with 3 products, undergraduate degrees, graduate degrees, and executive education. SBSC has 3 service departments, Computer Support, Career Development, and the Library.
Lifo method of accounting for inventory : During 2012, Crop-Paper-Scissors, a craft store, changed to the LIFO method of accounting for inventory. Suppose that during 2013 they switch back to the FIFO method and the following year switch back to LIFO again.

Reviews

Write a Review

Chemistry Questions & Answers

  What is the final temperature of the water

a 2.00 kg sample of pure water at 20.0 degree celsius absorbs 3.53 kJ of heat. What is the final temperature of the water?

  .calculate the mass of 0.1550l of benzene

the density of benzene at 15 degrees C is 0.8787g/ml.calculate the mass of 0.1550L of benzene at this temp.

  What is h concentration of chloride ion

25.0 ml of a 0.2450 M NH4Cl solution is added to 55.5ml of 0.1655 M FeCl3. What is H concentration of chloride ion in the final solution.

  What is the wavelength of this frequency of light

Light with a frequency of 7.11 x 10 -14 Hz lies in the violet region of the visible spectrum. What is the wavelength of this frequency of light? Answer in units of nm.

  Calculate the volume of water in the ocean in liters

Assume the Pacific Ocean has a surface area of 1.7 x 108 km2 and an average depth of 3900 m. Calculate the volume of water in the ocean in liters

  Explain working with partition function and entropy

Working with partition function and entropy what is the ratio of the number of particles in the J= 14 to the J=4 level at a temperature of 1900 K?

  What volume does it occupy at stp

The volume of a sample of hydrogen is 798mL and it exerts 621mmHg pressure at 5.00C. what volume does it occupy at standard temperature and pressure.

  What would be expected mass of the cooled dehydrated salt

If a 2.743g sample of MgSO4.7H2O were heated strongly,what would be the expected mass of the cooled dehydrated salt

  How many liters of chlorine gas are generated

In the electrolysis of aqueous NaCl, how many liters of Cl2(g) (at STP) are generated by a current of 7.50 A for a period of 100. min.

  What is the solubility in moles/liter for copper(ii) iodate

What is the solubility in moles/liter for copper(II) iodate at 25 oC given a Ksp value of 1.4 x 10-7. Write using scientific notation and use 1 or 2 decimal places (even though this is strictly incorrect!).

  How much chlorine can be produced

Balance the equation and answer in terms of moles.Chlorine gas can be produced commercially by passing an electric current through a concentrated solution of sodium chloride (brine).

  Determine how many carbon in this empirical formula

Find out the empirical formula also determine how many carbon,hydrogen, oxygen atoms are in there in this empirical formula?

Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd