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heavy non-metalic liquid

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#1 fidlersgrn



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Posted 28 November 2016 - 09:09 AM

In building some gyroscopic navigation equipment for a company, we used a very heavy clear liquid to suspend a spinning ball in this liquid. The liquid must have weighed over 100lbs in a 5 gallon can. What kind of liquid would it be? What is the heaviest known non-metallic liquid?

Edited by fidlersgrn, 28 November 2016 - 09:11 AM.

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#2 imatfaal


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Posted 28 November 2016 - 02:22 PM



100lbs = 45.4 kilograms

5 gallons (presume US) = 19000 cm^3 = 0.019 m^3


Mass density of your liquid = 45.4/0.019 = 2389 kg.m^-3


Carbon Tet and Percholethylene are around the 1600 kg.m^-3 so need denser than that  (btw mercury is 13500 kg.m^-3).  The seriously concentrated acids are a little higher at the 1800 kg.m^-3 mark.  To get past 2000 kg.m^-3 the only thing I can see is liquid bromine at 3100 kg.m^-3


And just after finding that I found wikipedia's list https://en.wikipedia...ki/Heavy_liquid

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#3 John Cuthber

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Posted 28 November 2016 - 08:48 PM

By far the least toxic of those liquids is the sodium polytungstate solution.

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#4 fidlersgrn



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Posted 29 November 2016 - 09:27 AM

Thanks Imatfaal and John. It was probably Carbon Tet.

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#5 studiot



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Posted 29 November 2016 - 12:11 PM

Gryoscopic fluid suspension is usually accomplished with a ferrofluid


https://books.google...n fluid&f=false


Typical densities range from 850 kg/m3 for oil based ferrolfluids to 1400 kg/m3 for water based ones.






The liquid must have weighed over 100lbs in a 5 gallon can.


Was the 100lbs a guess or an actual weighing and did this include the can and was that Imperial or US Gallons and was the volume a guess as well?


I ask this because of these comparisons.


1 UK gallon of water weighs 10 lbs and a US gallon about 8.4 lbs.


By comparison with imatfaal's figures


Earth and rock is about 2000 - 2200 kg/m3


Concrete is 2200 - 2400 kg/m3

Edited by studiot, 29 November 2016 - 01:34 PM.

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#6 hypervalent_iodine


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Posted 29 November 2016 - 07:58 PM

Depending on how long ago you're talking, I doubt it was carbon tet. That stuff is next to impossible to get a hold of these days.
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#7 fidlersgrn



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Posted 30 November 2016 - 01:00 AM

STUDIOT; This was about 25 years ago, and I remember lifting the 5 gallon (US measure) metal can full of this liquid and it felt like the weight of a 100 lb bag of cement. I was just curious as to what type of liquid it could be. I don't remember them telling me what it was back then. To me, as a layman, I figured all clear liquids should weigh about the same. I appreciate your patience with me, I know very little about chemistry.

HYPERVALENT-IODINE, Thanks for coming back on this. The incident I referred to was 25 years ago. I have since learned that it is a toxic chemical and harmful to the environment.

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