A solution of methyl acetate (CHO,) and water is boiling at 95.7°C. A sample of the vapor above the solution is cooled until it condenses. This condensedsample is analyzed, and turns out to be 50.% methyl acetate by mass.Calculate the percent by mass of methyl acetate in the boiling solution. Here's some data you may need:vapor pressureat 95.7 °Cnormaldensityboiling point2419. torr0.93mL57. °Cmethyl acetate651. torr1.00mL100. CwaterBe sure your answer has 2 significant digits.Note for advanced students: you may assume the solution and vapor above it are ideal.x10wwww.mw.?Xww.aimCheckPrivacyTerms of UseExplanation2019 McGraw-Hill Education. All Rights Reserved.

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Asked Nov 15, 2019
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Calculate the percent by mass of methyl acetate in appointing solution around two significant digits

A solution of methyl acetate (CHO,) and water is boiling at 95.7°C. A sample of the vapor above the solution is cooled until it condenses. This condensed
sample is analyzed, and turns out to be 50.% methyl acetate by mass.
Calculate the percent by mass of methyl acetate in the boiling solution. Here's some data you may need:
vapor pressure
at 95.7 °C
normal
density
boiling point
2419. torr
0.93
mL
57. °C
methyl acetate
651. torr
1.00
mL
100. C
water
Be sure your answer has 2 significant digits.
Note for advanced students: you may assume the solution and vapor above it are ideal.
x10
wwww.m
w.
?
X
ww.aim
Check
Privacy
Terms of Use
Explanation
2019 McGraw-Hill Education. All Rights Reserved.
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A solution of methyl acetate (CHO,) and water is boiling at 95.7°C. A sample of the vapor above the solution is cooled until it condenses. This condensed sample is analyzed, and turns out to be 50.% methyl acetate by mass. Calculate the percent by mass of methyl acetate in the boiling solution. Here's some data you may need: vapor pressure at 95.7 °C normal density boiling point 2419. torr 0.93 mL 57. °C methyl acetate 651. torr 1.00 mL 100. C water Be sure your answer has 2 significant digits. Note for advanced students: you may assume the solution and vapor above it are ideal. x10 wwww.m w. ? X ww.aim Check Privacy Terms of Use Explanation 2019 McGraw-Hill Education. All Rights Reserved.

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Expert Answer

Step 1

Given that,

Boiling point of the solution = 95.7 C

Mass of methyl acetate = 50%

Assume that mass of the solution = 100g

Then, mass of methyl acetate = 50 g

Mass of water = 50g

Step 2

Now you calculate the no.of mole of methyl acetate and water

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Given mass No.of moles Molar mass 50g No.of moles of methylac etate= 74- mole 0.676 mole 50g No.of moles of water=- 18 g mole 2.78mole

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Step 3

Now, you calculate the mole fraction...

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no.of mole of methyl acetate Mole fraction of methyl acetate=- moles of methyl acetate moles of water 0.676 0.676 2.78 =0.196 no.of mole of water Mole fraction of water=- moles of methyl acetate+moles of water 2.78 0.676 2.78 =0.804

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