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Korvikt [17]
2 years ago
11

Outlined below are statements describing the general procedure followed during purification of a solid by recrystallization proc

ess. Order the process from start to finish. (Answer format - e.g., ABCDEF without any spaces and/or commas.)
A. Isolate the crystallized solid by vacuum (suction) filtration on a Buchner funnel.
B. Obtain the melting point of solid and calculate % recovery.>
C. Add decolorizing charcoal to the hot solution to remove the colored impurity.>
D. Remove undissolved material by gravity filtration of hot solution.
E. Calculate the approximate volume of solvent required for recrystallization and measure out the amount plus 10-30% extra.
F. Dissolve the impure solid in hot recrystallization solvent.
Chemistry
1 answer:
d1i1m1o1n [39]2 years ago
4 0
I think The answer is A
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Ethanol (CH3CH2OH), the intoxicant in alcoholic beverages, is also used to make other organic compounds. In concentrated sulfuri
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Answer:

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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