Viscosities of Liquids Essay Example

pipette Solutions: Water was used as a reference liquid. Then a binary solution was made of a 20% methanol in water, 40% methanol in water, 60% methanol in water, 80% methanol in water and 100% methanol. The next set of solutions was made as a toluene/p-xylene mixture.

The first solution was 100% p-xylene, the second was 20%toluene/p-xylene, the third was 40%toluene/p-xylene, and the fourth was 60% toluene/p-xylene, the fifth was 80%toluene/p-xylene, and the last one was 100% toluene. ResultsSee attached tables and graphs. Analysis and Discussion of Data and Results It is possible to have a homogenous binary liquid solution whose viscosity is higher or lower than that of either of the two component liquids. This happened in this experiment with both methanol/water and p-xylene/toluene.

This shows that the intermolecular forces cause the mixture of the liquid to have a larger resistance to flow then the pure solution. In this experiment the ideal solution was the p-xylene/toluene and the non ideal solution was the methanol/water.It is clear to see this because when testing the validity of equation 3 and 4 the fluidities came out to be almost exactly the same for the p-xylene/toluene mixture. The fluidities for the methanol/water mixture came out different for the different equations. This is because this was not an ideal mixture. The known value of p-xylene and the measured value of p-xylene were fairly close.

The known value of the viscosity of p-xylene was 0. 6475 mPa s. The measured value of the viscosity of p-xylene was 0. 25 mPa s.

The known and measure viscosities of methanol were also very close. The known value was 0. 59 mPa s.

The measured value was 0. 594. The known and measured viscosities of toluene were also very close.

The known value was 0. 590. The measured value was 0. 580.

This shows that the calculations were done correctly and the experiment went well. Works Cited. Halpern, Arthur M. ; McBane, George C. ; Experimental Physical Chemistry: A Laboratory Textbook, 3rd ed.

; W. H. Freeman and Company. : New York, 2006.