Methyl benzoate can be synthesized by a fisher esterification reaction, and then this ester can be used as a starting material in the grignard synthesis of triphenyl carbinol. suppose that in the synthesis of methyl benzoate, a student started with 13.45 grams of benzoic acid and 32.5 ml of methanol. after finishing the preparation of the ester, 10.65 grams of methylbenzoate was obtained, and the benzoic acid reacted completely. what is the percent yield of the ester? ( density methanol = 0.791 g/ml, methanol = 32.04 g/mol, methyl benzoate = 136.15 g/mol, benzoic acid = 122.12 g/mol )

Answer : The percent yield of ester is, 71.05 %

Solution : Given,

Mass of benzoic acid = 13.45 g

Volume of methanol = 32.5 mL

Molar mass of benzoic acid = 122.12 g/mole

Molar mass of methanol  = 32.04 g/mole

Molar mass of methyl benzoate = 136.15 g/mole

First we have to calculate the moles of benzoic acid.

Now we have to calculate the moles of methyl benzoate.

The balanced chemical reaction is,

From the balanced reaction we conclude that

As, 1 mole of benzoic acid react to give 1 mole of methyl benzoate.

So, 0.1101 mole of benzoic acid react to give 0.1101 mole of methyl benzoate.

Now we have to calculate the mass of methyl benzoate.

Theoretical yield of methyl benzoate = 14.99 g

Experimental yield of methyl benzoate = 10.65 g

Now we have to calculate the percent yield of ester.

Therefore, the percent yield of ester is, 71.05 %

explanation:

the largest database of organic compounds lists about 10 million substances, which include compounds originating from living organisms and those synthesized by chemists. the number of potential organic compounds has been estimated at 1060—an astronomically high number. the existence of so many organic molecules is a consequence of the ability of carbon atoms to form up to four strong bonds to other carbon atoms, resulting in chains and rings of many different sizes, shapes, and complexities. the simplest organic compounds contain only the elements carbon and hydrogen, and are called hydrocarbons. even though they are composed of only two types of atoms, there is a wide variety of hydrocarbons because they may consist of varying lengths of chains, branched chains, and rings of carbon atoms, or combinations of these structures. in addition, hydrocarbons may differ in the types of carbon-carbon bonds present in their molecules. many hydrocarbons are found in plants, animals, and their fossils; other hydrocarbons have been prepared in the laboratory. we use hydrocarbons every day, mainly as fuels, such as natural gas, acetylene, propane, butane, and the principal components of gasoline, diesel fuel, and heating oil. the familiar plastics polyethylene, polypropylene, and polystyrene are also hydrocarbons. we can distinguish several types of hydrocarbons by differences in the bonding between carbon atoms. this leads to differences in geometries and in the hybridization of the carbon orbitals.

the answer would be b i believe