Objective:
The objective of this lab was to find and examine the viscosities of ideal and non-ideal solutions. The ideal being the toluene/p-xylene and the non-ideal being the methanol/water. The second objective of this lab was to investigate the temperature dependence of viscosity (Halpern, 17-1).

Introduction:
Viscosity is the resistance to flow of a certain fluid. In this experiment two solutions are used. According to the definition of viscosity mobile liquids have a relatively low viscosity. Fluidity is the reciprocal of viscosity, given as equation 1: F=1/ η. Fluidity is advantageous because solutions of mixed solutions of nonassociating liquids are roughly additive. In this experiment binary solutions are used, so if each pure liquid has fluidities Fa and Fb, the fluidity of a mixture is given by: Equation1 (Halpern, 17-3). F=xAFA•+xBFB• where Xa and Xb are the mole fractions.

The viscosity of the mixture is given as:
ln η = XA ln η •A + XB ln η •B Equation 2 (Halpern, 17-3)
The second part of this lab is to measure the temperature dependence of viscosity. It is known that the viscosity of a pure liquid will increase exponentially. If the flow time of a liquid is measures and the density is known the viscosity will then be given as: Equation 3 (Halpern 17-5).

η = η r ρt/ ρrtr where μr, ρr,tr are the viscosity, density, and flow time of the reference liquid, in this case water (Halpern, 17-4).

Materials and Methods:
Method:
The method for this lab was taken from Halpern pgs 17-4 to 17-6. Materials:
The materials used for this lab were:
Ostwald Viscometer
Digital Thermometer
Hot water bath
5mL 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...

...Lab report: Viscosity of Liquids
Introduction
This experiment focuses on measurements of different trials of various concentrations. The collected data is used to compare and contrast to the ideal binary solutions and their components. The Ostwald viscometer is a useful laboratory equipment to measure the viscosities of many binary solutions.
Background
Molecules have the ability to slide around each other, result in a flow. Such a flow...

...39. The Viscosity of Liquids
After studying the present lecture, you will be able to
Define viscosity and viscosity coefficient
Outline the method to measure viscosity using Ostwald viscometer
Determine the average molecular weight of a polymer
Determine the surface concentration of 1-butanol in aqueous solution
Measure the distribution coefficient of a solute betweenn two solvents
39.1 Introduction...

...Experiment 1: Viscosity of Liquids
Victoria Kulczak
Lab Partners: Laina Maines & Heidi Osterman
Date of Lab: 2/21/11
Due Date: 2/28/11
Abstract:
The goal of this experiment was to determine the viscosity of given liquids. Two different methods were employed, the first measures time of flow of several methanol-water solutions, from point A to point B. The second method involves dropping a foreign object, in this case a sphere,...

...the measurement of viscosity while rheometry refers to the experimental techniques used to determine the rheological properties of materials, that is the quantitative and qualitative relationships between deformations and stresses and their derivatives. The definition of viscosity was put on a quantitative basis by Newton, who was first to realize that the rate of flow was directly related to the applied stress. The constant of proportionality is the coefficient of...

...My report is dealing with liquidviscosity and how they are used to help us measure liquids and gives us the accurate temperature that we have today. I first want to talk about viscosity and the role it plays in all of our lives. Viscosity is a liquid that does not have the ability to know the flow and what it is measuring like NS m-2. Then there is viscometers and there roll is to measure liquid...

...
Viscosity of sweetened water
Avery Safley
Introduction:
Have you ever wondered why your honey comes out of the bottle so slow? The answer to this is viscosity. Viscosity is the resistance of a liquid to flow. Every liquid exhibits this resistance to some degree. Therefore the more resistance shown, the higher the viscosity. It can be thought of as fluid friction, just as solids show friction...

...Viscosity of Liquids
Part I: Low Viscosities
Mona Kanj Harakeh
1
Objectives
• To measure and analyze the viscosities of ideal (Toluene/p-Xylene) and nonideal (Methanol/Water) binary solutions and their components. • To determine the Activation Energy to viscous flow. • The effect of temperature change on the viscosity will be studied. Method: The viscosities of liquids are determined by...

...Viscosity Science Lab
Purpose:
To determine of changing the viscosity will affect the time it takes for a marble to flow through a liquid.
Hypothesis:
If a marble is dropped into dish soap and corn syrup, than I predict that the marble in the dish soap will travel faster than the marble in the corn syrup because I know that the viscosity of the corn syrup is thicker than then the viscosity of the dish soap. Also,...

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