Ethanol (ch3ch2oh), the intoxicant in alcoholic beverages, is also used to make other organic compounds. in concentrated sulfuric acid, ethanol forms diethyl ether and water: 2ch3ch2oh(l) → ch3ch2och2ch3(l) + h2o(g) in a side reaction, some ethanol forms ethylene and water: ch3ch2oh(l) → ch2═ch2(g) + h2o(g) a) if 50.0 g of ethanol yields 35.9 g of diethyl ether, what is the percent yield of diethyl ether? b) during the process, 45.0% of the ethanol that did not produce diethyl ether reacts by the side reaction. what mass of ethylene is produced?

a) 88.48%

b) 0.05625 mol

Explanation:

2CH₃CH₂OH(l) → CH₃CH₂OCH₂CH₃(l) + H₂O(g)         Reaction 1

CH₃CH₂OH(l) → CH₂═CH₂(g) + H₂O(g)                        Reaction 2

a) CH₃CH₂OH = 46.0684 g/mol

   CH₃CH₂OCH₂CH₃ = 74.12 g/mol

1 mol CH₃CH₂OH  46.0684 g

x                               50.0 g

x = 1.085 mol  CH₃CH₂OH

1 mol  CH₃CH₂OCH₂CH₃  74.12 g g

y                             35.9 g

y = 0.48 mol   CH₃CH₂OCH₂CH₃

100% yield 0.5425 mol CH₃CH₂OCH₂CH₃

w                  0.48 mol CH₃CH₂OCH₂CH₃

w = 88.48%

b) Only 0.96 mol of ethanol reacted to form diethyl ether. This means that 0.125 mol of ethanol did not react. 45% of 0.125 mol reacted to form ethylene. Therefore, 0.05625 mol of ethanol reacted by the side reaction (reaction 2). Since 1 mol of ethanol leads to 1 mol of ethylene, 0.05625 mol of ethanol produces 0.05625 mol of ethylene.

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