Short & simple viscosity question

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SUMMARY

The viscosity of glycerol was calculated to be approximately 1.9 P, which is higher than the expected value of 1.5 P. The discussion suggests that evaporated water may contribute to this increased viscosity, as water can absorb into glycerol and enhance its viscosity through hydrogen bonding. The viscosity measurement was conducted at an average temperature of 21 degrees Celsius, with a density of 1200 kg/m³ and a parallax error of 10.7%. The potential for water absorption into glycerol when exposed to air is highlighted as a significant factor affecting viscosity.

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mr-tom
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I've managed to calculate the viscosity of glycerol to be about 1.9 P. Google says it's supposed to be 1.5. Could I say that evaporated water has caused the glycerol to become more viscous than it should be? (It could just be a thicker glycerol but I'm just looking things to blab on about)
Basically: Does water evaporate from glycerol and if so does it make it more viscous?
 
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What's your calculation?
 
It's abit lengthy and I'm pretty sure it's right, I just need to know whether water evaporates from glycerol if you leave it out without a lid.
 
Try it- put some in a watch glass, see what happens.

Have you measured the density? What temperature did you do the viscosity measurement at? What are your error sources?
 
The density was given as 1200 kg m-3, temperature was an average of 21 degrees C. My only error source is parrallax error. But my % error was 10.7%. I can't really try it but I'll mention the watch glass thing in my evaluation, thanks.
 
Water actually absorbs into most alcohols if the alcohol is left in the air however I'm not quite certain if this the case with glycerol. Water makes a lot of substances more viscous especially if it can hydrogen bond with the other species. In this light water probably absorbed into your glycerol and caused it to become more viscous.
 

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