Homework Help: Inorganic

Posted by Tracy on Tuesday, November 20, 2007 at 5:37pm.

Heyy, I have a quick question. I am doing binary systems, and I have a water/propanol system, and it says " 0.433 mole fraction propanol (71.7% propanol by weight)" does this mean that the mole fraction of water is 0.433 or propanol? Cause if propanol is 71.7% then wouldn't it be the bigger fraction, and if Xprop + Xwater = 1 then then other fraction would be 0.567 and wouldn't that be bigger?

Inorganic - DrBob222, Tuesday, November 20, 2007 at 6:01pm
If it says 0.433 mol fraction of propanol then that must be what it is. The mole fraction of water will be 1.000 - 0.433 = ??
Remember that propanol has a molar mass much larger than that of water and mol fraction is [mols Prop/(mols Prop + mols H2O)]. You might want to do a quick calculation, to satisfy your curiosity, that 71.7 g prop + 28.3 g water gives a mol fraction of 0.433.

Answer this Question

Related Questions

science - Hi. I know this is an opinion question, but can someone please explain...
Chemistry - The vapor pressures of ethanol (C2H5OH) and 1-propanol (C3H7OH) are ...
chemistry - I have 3 questions that I am uncertain about. 1) what determines the...
Chemistry - The heat of combustion of 2-propanol at 298.15 , determined in a ...
chem - The heat of combustion of 2-propanol at 298.15 {\rm K}, determined in a ...
chemistry 1B - 1-propanol (P1° = 20.9 Torr at 25 °C) and 2-propanol (P2&...
GenChem II - What mass of CsBr must be added to .500L of water to produce ....
pre ap chem - determine the partial pressure of hydrogen if it's collected ...
chemistry - The vapor pressures of several solutions of water-propanol(...
math - the binary system is used for computer programming. a binary number ...

For Further Reading

First Name:
School Subject:
Answer: