Problem 6.133 A certain alcoholic beverage contains only ethanol (C2H6O) and wat

Question

Problem 6.133

A certain alcoholic beverage contains only ethanol (C2H6O) and water. When a sample of this beverage undergoes combustion, the ethanol burns but the water simply evaporates and is collected along with the water produced by combustion. The combustion reaction is
C2H6O(l)+3O2(g)2CO2(g)+3H2O(g)
When a 10.53 g sample of this beverage is burned, 11.41 gof water is collected.

Part A

What is the mass in grams of ethanol in the original sample?

Express your answer using two decimal places.

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Part B

What is the mass of water in the original sample?

Express your answer using two decimal places.

Problem 6.133

A certain alcoholic beverage contains only ethanol (C2H6O) and water. When a sample of this beverage undergoes combustion, the ethanol burns but the water simply evaporates and is collected along with the water produced by combustion. The combustion reaction is
C2H6O(l)+3O2(g)2CO2(g)+3H2O(g)
When a 10.53 g sample of this beverage is burned, 11.41 gof water is collected.

Part A

What is the mass in grams of ethanol in the original sample?

Express your answer using two decimal places.

m =   g  

SubmitMy AnswersGive Up

Part B

What is the mass of water in the original sample?

Express your answer using two decimal places.

m =   g  

Explanation / Answer

Let X g of water , Y g of ethanol

in the original sample X + Y = 10.53

C2H6O + 3 O2 = 2 CO2 + 3 H2O

46 g of ethanol gives 54g of water

Y g of ethanol gives 54 / 46 Y g of water

so X + 54 / 46 Y = 11.41
and X + Y = 10.53

On solving we get X=5.35 and Y = 5.18

the original solution is made up of 5.35 g of water and 5.18g of ethanol

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