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| Heat the Solvent |
particles mov efaster as energy increases
More collisions between solute and solvent |
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mstarten2 Mon, 22 Mar 2010 20:29:47 GMT |
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| Agitate Solution... |
spreads out already dissolved solute to bring in fresh solvent in contact w/ solute
Ex: shake, stir |
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mstarten2 Mon, 22 Mar 2010 20:29:47 GMT |
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| Increase surface area of solute... |
more solute is touching solvent
ex: crush and spread out |
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mstarten2 Mon, 22 Mar 2010 20:29:47 GMT |
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| Factors that affect rate of dissolving |
Increase surface area of solute, Agitate Solution, heat solvent |
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mstarten2 Mon, 22 Mar 2010 20:29:47 GMT |
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| Tyndall effect |
light can be scattered by collodial particles |
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mstarten2 Mon, 22 Mar 2010 20:29:47 GMT |
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| Evidence that it is a colloid |
scatter light
does ont immediatly settle |
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mstarten2 Mon, 22 Mar 2010 20:29:47 GMT |
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| Dispersing Medium (colloid) |
solvent like Medium |
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mstarten2 Mon, 22 Mar 2010 20:29:47 GMT |
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| Dispersed phase (colloid) |
solute like particles |
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mstarten2 Mon, 22 Mar 2010 20:29:47 GMT |
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| colloids |
inbetween solution and suspension, medium sized particles, small enough to be kept in permanent suspension
Ex: milk |
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mstarten2 Mon, 22 Mar 2010 20:29:47 GMT |
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| evidence that it is a suspension |
can be physically sepearated
particles settle
may scatter light
not transparent |
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mstarten2 Mon, 22 Mar 2010 20:29:47 GMT |
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| suspension |
particles in a solvent are so large that they settle out unless the mixture is constantly stirred
ex: muddy water |
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mstarten2 Mon, 22 Mar 2010 20:29:47 GMT |
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| Evidence that an alloy is a solution |
cannot be filtered
no light is scattering |
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mstarten2 Mon, 22 Mar 2010 20:29:47 GMT |
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| alloy |
atoms of 2 or more metals are uniformly mixed
ex: Sterling Silver Cu+Ag |
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mstarten2 Mon, 22 Mar 2010 20:29:47 GMT |
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