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Which of the following options are required to increase the percent yield of the

ID: 1028719 • Letter: W

Question

Which of the following options are required to increase the percent yield of the reaction of dehydration of an alcohol to form an alkene? Choose all that apply.

1- Removing the product by distillation pushes the equilibrium towards the formation of more product

2- Change of reaction temperature pushes the equilibrium towards the formation of more product

3- Addition of more sulfuric and/or phosphoric acid pushes the equilibrium towards the formation of more product

4- Addition of water pushes the equilibrium towards the formation of more product

Explanation / Answer

% yield will increase by option 1, 2 and 3.

the dehydration process is catalyzed by temperature and sulfuric and/or phosphoric acid  

as it decreases the activation energy to form more product.

according to La chetelier principle. removal of product will increase the forward reaction to produce more product.

but the addition of water (option 4) does not help because it is the process of removal of water. therefore, addition of water will reverse the reaction.

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