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Topic: Molality  (Read 2117 times)

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Offline Rutherford

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Molality
« on: April 27, 2012, 02:33:04 PM »
Calculate the number of moles of HCl if the molality of the HCl solution (m=1000g) is 1mol/kg.

First I calculated this way (using the mass of the solution):
1mol(HCl):(1000+36.5)g=x:1000g x=0.965mol, wrong answer.
Why?
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Offline fledarmus

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Re: Molality
« Reply #1 on: April 27, 2012, 03:57:26 PM »
I'm not sure I understand the question - are you supposed to calculate the number of moles in one kilogram of a one molal solution, or are you supposed to calculate the molarity of a one molal solution?
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Offline Rutherford

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Re: Molality
« Reply #2 on: April 28, 2012, 06:47:20 AM »
The thing you wrote first.
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Offline Rutherford

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Re: Molality
« Reply #3 on: April 28, 2012, 07:24:04 AM »
Never mind, I found out that it is the right answer.
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