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PostPosted: Tue Aug 17, 2010 3:56 am 
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Supercharged
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Dart270 wrote:
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The sugar molecules have a much higher affinity for each other than for the gasoline molecules (greasy, oily) and so the two do not mix


This doesn’t explain frosting… which I have an affinity for. LOL
Bill

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PostPosted: Wed Aug 18, 2010 12:10 pm 
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Frosting is more like an emulsion - mix of tiny droplets of oil in water, or the reverse. Can't explain your particular affinity...

Lou

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PostPosted: Wed Aug 18, 2010 4:16 pm 
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Supercharged
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A couple of examples might help. The milky-brown froth that forms when water gets in the crankcase is an emulsion. The "particles" of oil and water, while stirred up and thoroughly mixed together are still seperate at the molecular level. The fluids could theoretically be separated by mechanical means, such as by running them through a centrifuge.

The thin soup that forms when gasoline gets in the crankcaee is a true solution... the fluids are mixed at the molecular level and cannot be separated by mechanical methods. Distillation or some chemical process would be required to separate them.

Another thing to look at is when one substance is dissolved in another, total volume of the resulting fluid is less that the combined volume of the component substances. In fact it's usually only slightly more than the volume of the solvent. If you dissolve a cup of sugar in a quart of water you end up with a quart of sugar-water. If you dump a cup of sugar in a quart of gasoline you will end up with a total volume of 1 quart plus 1 cup (ignoring the air in the spaces between the sugar grains) no matter how much you stir and mix them.

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PostPosted: Thu Aug 19, 2010 9:16 am 
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Supercharged
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Me quoting me:

[quote]This doesn’t explain frosting… which I have an affinity for. LOL
Bill[/quote]

Maybe I should have posted this under: “Smart Ass Departmentâ€￾. Just having fun with the words.

I fully understand the difference between solutions, slurries, mixtures, and emulsification… Moles and that polar stuff is where I fall off the cliff… That's why I married a chemist, so I would have someone to explain the inexpiable, well inexpiable to me anyway.

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