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Topic: % by mass in solution  (Read 3699 times)

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Offline angel68

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% by mass in solution
« on: February 10, 2008, 05:25:35 PM »
density of 1.24g/mL and is 9.14M. Calculate the % by mass in solution. (MW is 63.02g/mL)?

mass solute
------------- x 100 = mass percent
mass solution

(1.24g/mL)(1000mL) = 1.24 x 10^3g --> mass solution

M=mole solute
   ------------
    L solution
I'm having trouble with next step.... Do I use the 9.14M to help get the mass of solute or do I use the MW?

Thanks for your help


Offline Borek

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Re: % by mass in solution
« Reply #1 on: February 10, 2008, 05:46:42 PM »
ChemBuddy chemical calculators - stoichiometry, pH, concentration, buffer preparation, titrations.info, pH-meter.info

Offline angel68

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Re: % by mass in solution
« Reply #2 on: February 10, 2008, 06:38:21 PM »

Offline Borek

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Re: % by mass in solution
« Reply #3 on: February 10, 2008, 06:58:40 PM »
No, you have to use the same approach to find out formula for molarity to percentage conversion.

Or - to make things much faster - don't derive everything, just solve final formula for percent concentration.
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Offline angel68

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Re: % by mass in solution
« Reply #4 on: February 10, 2008, 08:06:40 PM »
No, you have to use the same approach to find out formula for molarity to percentage conversion.

Or - to make things much faster - don't derive everything, just solve final formula for percent concentration.

Thanks so much!!! I appreciate your help. ;D

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