The time of efflux of H2O through an Ostwald viscometer is 1.52 minutes. For the same volume of an organic liquid of density 0.800 g/cc the time is 2.25 minutes. Find the viscosity of the liquid relative to that of water and its absolute value in millipoises. The temperature is 20 C.
Answer:
The initial efflux time calibrates the viscometer. You need to look up the viscosity of water to get the viscometer constants. Then plug in the density and time of the organic liquid.
To measure and get a relative value, the best way is to use a vibrating viscometer such as SOFRASER viscometers.
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