Is ostwald's viscometer use for measure coefficient of viscosity?
viscosity sure of it
Yes, Ostwald's viscometer is indeed used to measure the coefficient of viscosity. Ostwald's viscometer is a glass capillary tube with a bulb at one end. The capillary tube is filled with the liquid whose viscosity is to be measured.
To measure the coefficient of viscosity using Ostwald's viscometer, you need to follow these steps:
1. Measure the time it takes for a certain volume of liquid to flow through the viscometer. This can be done by filling the bulb of the viscometer completely with the liquid and then allowing it to flow freely through the capillary.
2. Measure the temperature of the liquid during the experiment, as the viscosity is temperature-dependent. Ensure that the temperature is kept constant throughout the experiment.
3. Repeat the measurement multiple times to obtain reliable and accurate results. The viscometer is usually calibrated using a liquid of known viscosity to ensure accurate measurements.
4. Calculate the viscosity using the formula:
viscosity = (density x g x t) / (2 x (R^2) x (l/t))
where density is the density of the liquid, g is the acceleration due to gravity, t is the time taken for the liquid to flow through the viscometer, R is the radius of the capillary tube, and l is the length of the capillary tube.
By following these steps and using Ostwald's viscometer, you can measure the coefficient of viscosity of a liquid.