Chemistry, 07.03.2020 05:25 livvyr0cks

Consider the Fischer ester synthesis of methyl benzoate from benzoic acid and methanol in the presence of sulfuric acid as a catalyst. A reaction was performed in which 3.6 g of benzoic acid was reacted with excess methanol to make 1.4 g of methyl benzoate. Calculate the theoretical yield and percent yield for this reaction.

Answers: 3

Show answers

Answers

Answer from: aalexissm

The percent yield of the reaction is 32.04 %.

Explanation:

To calculate the number of moles, we use the equation:

$\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}$ .....(1)

Given mass of benzoic acid = 3.6 g

Molar mass of benzoic acid = 112.12 g/mol

Putting values in equation 1, we get:

$\text{Moles of benzoic acid}=\frac{3.6g}{112.12g/mol}=0.0321mol$

The chemical equation for the formation of methyl benzoate from benzoic acid follows:

$\text{Benzoic acid + Methanol}\rightarrow \text{Methyl benozate}$

By Stoichiometry of the reaction:

1 mole of benzoic acid produces 1 mole of methyl benzoate

So, 0.0321 moles of benzoic acid will produce = $\frac{1}{1}\times 0.0321=0.0321mol$ of methyl benzoate

Now, calculating the mass of methyl benzoate from equation 1, we get:

Molar mass of methyl benzoate = 136.15 g/mol

Moles of methyl benzoate = 0.0321 moles

Putting values in equation 1, we get:

$0.0321mol=\frac{\text{Mass of methyl benzoate}}{136.15g/mol}\\\\\text{Mass of methyl benzoate}=(0.0321mol\times 136.15g/mol)=4.37g$

To calculate the percentage yield of methyl benzoate, we use the equation:

$\%\text{ yield}=\frac{\text{Experimental yield}}{\text{Theoretical yield}}\times 100$

Experimental yield of methyl benzoate = 1.4 g

Theoretical yield of methyl benzoate = 4.37 g

Putting values in above equation, we get:

$\%\text{ yield of methyl benzoate}=\frac{1.4g}{4.37g}\times 100\\\\\% \text{yield of methyl benzoate}=32.04\%$

Hence, the percent yield of the reaction is 32.04 %.

Answer from: Quest

All the elements are arranged by melting points on the periodic table. in row they go from metals to gasses. in the row from sodium to argon, sodium is more reactive than the one on its right, magnesium.

Answer from: Quest

Mass is the amount of matter in an object. weight is the measurement of the pull of gravity on an object. say for example, you travel to the moon which has a different gravitational field compared to the gravitational field of earth. (gravitational fields: earth = 1, moon = 0.165) now when you are on the moon, the pull of gravity on you is different than on the earth. and as weight is the measurement of the pull of gravity on an object, that means yes, your weight can and will change on the moon. however, on the moon, on earth or even on jupiter, the amount of mass inside of you remains the same. meaning your physical mass remains constant. in conclusion it is possible for your weight to change as your mass remains constant.

Another question on Chemistry

Chemistry, 21.06.2019 19:30

Water molecules have a strong attraction to each other because of hydrogen bonding, allowing water to move against gravity up a plant's stem through capillary action. true false

Answers: 2

Answer

Chemistry, 22.06.2019 03:30

In this chemical reaction, 325 grams of barium (ba) react completely. how many moles of lithium (li) are produced?

Answers: 1

Answer

Chemistry, 22.06.2019 05:30

Which of the following signs of a chemical reaction are observed in the reaction of potassium with water? precipitate formed temperature change smell produced gas produced color change

Answers: 2

Answer

Chemistry, 22.06.2019 09:00

Astudent is asked to identify and element that is pale yellow brittle solid and does not conduct electricity. at which location in this periodic table would the element most likely be found?

Answers: 2

Answer

You know the right answer?

Consider the Fischer ester synthesis of methyl benzoate from benzoic acid and methanol in the presen...

Questions