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Topic: Formula to Calculate the molarity of a solution  (Read 2500 times)

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Offline atrum

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Formula to Calculate the molarity of a solution
« on: July 14, 2013, 08:15:55 PM »
Hello all,

 I am performing a synthesis of Hydrazine Sulfate by the  hypochlorite ketazine process. I have all the chemicals needed except the 98% Sulfuric Acid. I have 93%. How do I calculate the extra amount needed to compensate for the other 5%?

I assume I need to know the formula to calculate molarity.
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Offline AWK

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Re: Formula to Calculate the molarity of a solution
« Reply #1 on: July 15, 2013, 07:29:24 AM »
It depends how exact concentration of sulfuric acid you need.
In procedure I know they used 20 ml of concentrated H2SO4 and 100 ml of water. 21:99 will be probably sufficient.
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Offline atrum

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Re: Formula to Calculate the molarity of a solution
« Reply #2 on: July 15, 2013, 05:42:58 PM »
Thank you,

 I was trying to teach my self the formula last night before I hit the sack.

That is close to the answer I got as well.

What I did was calculate the % per liter and got 19.6ml out of the 20ml needed if I were to use the 98%. So I substituted 93% into the equation and got 21.08ml.

Was that the right way to go about it?
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