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Topic: molarity problem  (Read 2819 times)

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Offline iluvlost

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molarity problem
« on: August 29, 2008, 02:13:52 PM »
What mass of aluminum hydroxide is produced when 50.0 ml of .200 M Al(NO3)3 reacts with 200.0 ml of .100 M KOH?

Al(NO3)3 + 3KOH-> Al(OH)3 + 3KNO3

.05L * .2 M = .01 mol Al(NO3)3
.2L * .1 M = .02 mol KOH

but i dont know where to go from here
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Offline Astrokel

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Re: molarity problem
« Reply #1 on: August 29, 2008, 03:01:32 PM »
hey iluvlost,

can you determine first the limiting reagent, then the rest will be simple stoichiometry.
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Offline organic_god

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Re: molarity problem
« Reply #2 on: August 29, 2008, 09:23:21 PM »
looks to me like your aluminium nitrate is in excess/

so basically 3 mols KOH produces 1 mol Aluminium hydroxide
therefore .02 mol KOH produces .02/3 mols of Aluminium hydroxide

mols * molar mass = mass

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