Question
The manufacture of ethanol (CH3CH2OH) yields diethyl ether ((C2H5)2O) as a by product. the complete combustion of a 1.005 g sample of the manufactured product yielded 1.963 g of carbon dioxide. what are the weight percents of ethanol and diethyl ether in the sample?
Answers
The easy way to solve this is to write two equations, solve them simultaneously, AND use chemical factors to write the equations. Schools don't teach chemical factors now (at least I'm not aware of any that do) but here is what you do.
Let X = weight ethanol
Let Y = weight ether
==================
X + Y = 1.005 is the first equation.
Now convert X to grams CO2 and Y to grams CO2 since you know the total CO2 is 1.953 grams.
X(2*molar mass CO2/molar mass EtOH) + Y(4*molar mass CO2/molar mass ether) = 1.963
Solve the simultaneously for Y, then
%ether = (Yin grams/mass sample which is 1.005)*100 = ?
Let X = weight ethanol
Let Y = weight ether
==================
X + Y = 1.005 is the first equation.
Now convert X to grams CO2 and Y to grams CO2 since you know the total CO2 is 1.953 grams.
X(2*molar mass CO2/molar mass EtOH) + Y(4*molar mass CO2/molar mass ether) = 1.963
Solve the simultaneously for Y, then
%ether = (Yin grams/mass sample which is 1.005)*100 = ?
Related Questions
what is the best synthesis of 2-heptanol
CH3CH2CH2MgBr(2 moles)+formaldehyde in diethyl ether fo...
A 1.33 m solution of the solute diethyl ether dissolved in the solvent tetrahydrofuran is available....
The common laboratory solvent diethyl ether (ether) is often used to purify substances dissolved in...
Diethyl ether (also known as “ether”), C4H10O (l), is an organic
compound that has long been used a...