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Topic: Weak acid - strong base reaction  (Read 1545 times)

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Offline Anpapage

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Weak acid - strong base reaction
« on: November 17, 2014, 04:09:59 PM »
Hello, I'm studying engineering and I have a problem about a weak acid - strong base reaction. My goal is to produce biodiesel by transesterification. I use KOH as a catalyst and I have to clean my biodiesel after the reaction. A friend gave me the idea to use acetic acid.

My reaction is CH3COOH + KOH   :rarrow: H2O + CH3COOK

Now here my problem is that I have to make all the KOH dissapear (1,75g) and I don't how to calculate how much acetic acid I have to put in my reactor  ???

Thx !  :)

Anthony

Offline Hunter2

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Re: Weak acid - strong base reaction
« Reply #1 on: November 18, 2014, 01:10:33 AM »
Calculate the mol  of your KOH. Mass is 1,75 g. This is equal to the acetic acid. Backward you get the mass and with the specific gravity and Percentage of the acid also the volume.

Offline Anpapage

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Re: Weak acid - strong base reaction
« Reply #2 on: November 18, 2014, 01:15:01 PM »
Yeah I had this idea this morning just when I woke up  ::) , yesterday I tried a lot of ways (using Ka but i had a divide by zero  ;D ). Sleep is the best friend of the engineer  ;D

Thank you anyway !

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