Lab Centrifuge
A look at what is currently available on eBay
 Kendro Laboratory Products LC Centrifuge Catalog# 3030512! US $299.55 
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 Sorvall General Laboratory Centrifuge GLC-2B w/Rotor HL-4 HL4 GLC2B US $299.99
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 Dental Lab Centrifuge Casting Machine US $139.00
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 Dental Lab Centrifuge Casting Machine US $139.00
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 Statspin Multi-Purpose Medical Lab Centrifuge US $400.00
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 Brand New Lab Mini Centrifuge 220V with European Adapter US $168.88
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 ACE E-Z PRP Dental Lab Centrifuge 2004 6000 RPM .156 kg US $575.00
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 220V Brand New Lab Mini Centrifuge w/ European Adapter US $169.88
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 220V Brand New Lab Mini Centrifuge w/ European Adapter US $169.88
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Physical or chemical change?
im doing a simulation lab on the computer, and im mixing various ions with different salt solutions. in some cases, the test tube will change colors, and when used with a centrifuge will seperate into two distinct substances. in other cases, the test tube will not change colors and will also not seperate. which situation is a chemical change and which is a physical change? i am confused because the color change suggests a chemical change, yet it can also be easily seperated by the centrifuge, which seems to suggest a physical change.
exactly. ugh im so confused. the ones that dont have a color change are also the ones that have no change in the centrifuge.
nevermind, i figured it out. the two distinct substances includes a solid and a liquid. since the two reactants were liquids it has to be a chemical reaction because of the precipitate.
The computer is soo wrong.
If they can be separated but change appearance it's physical.
If it CAN NOT be separated it's chemical. (Hence term Chemical bond.)
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September 8th, 2005 in
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