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Topic: general chemistry problem  (Read 4991 times)

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Offline tigger408

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general chemistry problem
« on: January 30, 2009, 01:59:12 AM »
Hi guys,
I need help with this problem. My only concern is how to get the total ionic equation and the answer.
Assume the Ca piece was pure (not partially oxidized) and weighed 4.5645g. Assuming the reaction goes to completion, how many grams of Ca(OH)2 should you have made?

Thank you
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Offline Astrokel

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Re: general chemistry problem
« Reply #1 on: January 30, 2009, 02:15:30 AM »
What reaction? Ca with water?
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Offline tigger408

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Re: general chemistry problem
« Reply #2 on: January 30, 2009, 02:54:48 AM »
yes, this reaction is with water
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Offline Astrokel

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Re: general chemistry problem
« Reply #3 on: January 30, 2009, 03:00:45 AM »
Write the chemical equation first and start to calculate moles. Always work with moles in stoichiometry.
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Offline tigger408

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Re: general chemistry problem
« Reply #4 on: January 30, 2009, 03:05:23 AM »
so what is the balanced ionic equation ?
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Offline Astrokel

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Re: general chemistry problem
« Reply #5 on: January 30, 2009, 04:15:23 AM »
It is given in the question.

Ca + H2O  :rarrow:
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Offline tigger408

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Re: general chemistry problem
« Reply #6 on: January 30, 2009, 05:20:46 PM »
I got 8.4368 g. can someone confirm that pls
ty
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Offline Astrokel

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Re: general chemistry problem
« Reply #7 on: January 31, 2009, 02:13:21 AM »
Right, i got around 8.43 g.
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