Question

In: Chemistry

Calculate the theoretical yield of this Williamson Ether Synthesis: Materials: 25 mL Erlenmeyer flask with stir...

Calculate the theoretical yield of this Williamson Ether Synthesis:

Materials:

25 mL Erlenmeyer flask with stir bar

0.8 mL (0.83g) p-cresol

0.7 mL 1-bromopropane

50 mg (0.05g) t-butyl ammonium bromide

-Add all reagents at room temperature, reflux ~1hr at a 3 setting on a hotplate, cool to room temperature

Workup:

- add 5 mL diethyl ether

-etc.

-etc....

Expert Solution

Mass of p-cresol = 0.83 g

Molar mass of p-cresol = 108.13 g/mol

Therefore moles of p-cresol = mass of p-cresol/molar mass of p-cresol = 0.83/108.13 = 0.0077 mol

Volume of 1-bromoprpane = 0.7 mL

Density of 1-bromopropane = 1.35 g/mL

Therefore mass of 1-bromopropane = volume of 1-bromopropane x density of 1-bromopropane

= 0.7 x 1.35

= 0.945 g

Molar mass of 1-bromopropane = 123 g/mol

Therefore moles of 1-bromopropane = 0.945/123 = 0.0077 mol

Moles of both of the reactants are same.

From the above equation, it is clear that theoretically 1 mol of each reactant will produce 1 mol of product.

Therefore, 0.0077 mol of each reactant will produce 0.0077 mol of product.

Molar mass of the product = 150.22 g/mol

Therefore, the theoretical yield of the product = 150.22 x 0.0077 = 1.16 g.

queen_honey_blossom answered 2 years ago

Procedure 1. A 25 mL round bottom flask equipped with a stir bar is loaded with...

Procedure 1. A 25 mL round bottom flask equipped with a stir bar is loaded with 13 mg of CdO powder, 0.6 mL of oleic acid, and 10 mL of 1-octadecene. The reaction flask is placed into a heating mantle and surrounded with aluminum foil so that the temperature can reach 225 °C, which will take approximately 1 hr. Some hot plates may heat up faster and the experiment can be performed sooner. 2. As the CdO solution is heating,...

Procedure: 1. A 25 mL round bottom flask equipped with a stir bar is loaded with...

Procedure: 1. A 25 mL round bottom flask equipped with a stir bar is loaded with 13 mg of CdO powder, 0.6 mL of oleic acid, and 10 mL of 1-octadecene. The reaction flask is placed into a heating mantle and surrounded with aluminum foil so that the temperature can reach 225 °C, which will take approximately 1 hr. Some hot plates may heat up faster and the experiment can be performed sooner. 2. As the CdO solution is heating,...

In a 25 mL round bottom flask and stir bar, dissolve approximately 2 mmol of indene...

In a 25 mL round bottom flask and stir bar, dissolve approximately 2 mmol of indene in approximately 10 mL of 85:15 isopropanol/water. Using a capillary pipette, spot a tiny amount of the resulting solution onto several TLC plates as described above. Add 4 mmol of NBS and attach a distillation condenser on to the flask but don’t bother to hook up to water. Stir to get some into solution (it may not all dissolve at this point). Stop stirring....

In the williamson ether synthesis of n-butyl methyl ether from 1-bromobutane, sodium, and ethanol, how could...

In the williamson ether synthesis of n-butyl methyl ether from 1-bromobutane, sodium, and ethanol, how could the purity as well as the percent yield of the product be improved?

A [a]ml aliquot of a nitric acid of unknown concentration is pipetted into 125-ml Erlenmeyer flask...

A [a]ml aliquot of a nitric acid of unknown concentration is pipetted into 125-ml Erlenmeyer flask and 2 drops of phenolphthalein are added. The [b] ml of sodium hydroxide with concentration [c]mol/l is used to titrate the nitric acid solution. What is the molar concentration (mol/l) of the nitric acid solution? For [a], [b], and [c] each student would have a different set of data. Practice how to solve this problem if [a] =20.00ml of nitric acid, [b] =17.60ml of...

1. Take a 150 mL Erlenmeyer flask from the Containers shelf and place it on the...

1. Take a 150 mL Erlenmeyer flask from the Containers shelf and place it on the workbench. 2. Add 10 mL of 6 M Hydrochloric acid (HCl) to the Erlenmeyer flask. Dilute with 10 mL of water. 3. Double-click on the Erlenmeyer flask to open the Item Properties window. Choose Close and click OK to plug the Erlenmeyer flask with an airtight stopper. 4. Take a thermometer and a pressure gauge from the Instruments shelf and attach each to the...

Experiment 3: Measure the Mass of Air Took a 150 mL Erlenmeyer flask & a balance...

Experiment 3: Measure the Mass of Air Took a 150 mL Erlenmeyer flask & a balance & placed them on the workbench. Moved the flask onto the balance; the mass = 88.000 g Closed the flask & attached a pressure gauge to the Erlenmeyer flask. Weight of the closed Erlenmeyer flask = 88.179 g Added 1.50 atm to the Erlenmeyer flask. The pressure = 1.50 atm The mass = 88.269 g Added air to the Erlenmeyer flask to a pressure...

You are given an Erlenmeyer flask containing 100.00 mL of 0.185 M B- and a buret...

You are given an Erlenmeyer flask containing 100.00 mL of 0.185 M B- and a buret containing 0.141 M HClO4. B- is a weak base with Kb of 5.5 x 10-6. Calculate the pH of the solution (to 2 decimal places) after titrating the following volumes of HClO4: What is the pH after 0.0 mL HClO4 is added? What volume of HClO4 is added at the equivalence point (to 0.1 mL)? What is the pH at the equivalence point? What...

Consider a titration involving 40.0 mL of 0.100 M ammonia , NH3 (in an Erlenmeyer flask)with...

Consider a titration involving 40.0 mL of 0.100 M ammonia , NH3 (in an Erlenmeyer flask)with 0.100 M HCl (in a burette) to answer the next two questions. NH3 + HCl

a) Calculate the theoretical yield of your product. The theoretical yield should be quoted as a...

a) Calculate the theoretical yield of your product. The theoretical yield should be quoted as a mass, not a number of moles. Units must be shown on all numbers that need them. Calculations that are done with an incorrect number of significant figures will be counted as incorrect. Your work must be shown. b) Calculate the percent yield for your product. This calculation should be done with masses of your product and the theoretical yield, not the number of moles....