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Topic: balanced equation: extracted C6H5COOH (benzoic acid) from H2O using CH2Cl2  (Read 22231 times)

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infinity1

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I did an experiment where I took extracted C6H5COOH (benzoic acid) from H2O using CH2Cl2. After extraction, I titrated the benzoic acid with NaOH solution. The titration was a light pink, which indicated the acidity of the solution.

The question is: Write the balanced equation for the reaction that occured when you titrated the aqueous layer with NaOH solution.

How do I write this?

If I have to take into consideration the CH2Cl2 and the water, I ended up with something like this:

C6H5COOH + H2O + CH2Cl2 + NaOH --> C6H5COOH + NaOH
where the H2O and CH2Cl2 were removed in order for the NaOH titration to happen.

Is this right? I am not sure. The end product in the experiment is benzoic acid.


Please reply soon. Any help will be greatly appreciated. Thanks.
« Last Edit: February 06, 2006, 12:58:33 PM by Mitch »

Offline Borek

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Re:balanced equation?
« Reply #1 on: February 05, 2006, 02:37:58 PM »
C6H5COOH + NaOH --> C6H5COOH

This is neutralization reaction - so you should have salt and water on the right side.

CH2Cl2 and water should be ignored - they don't take part in the reaction (other then water being product).
« Last Edit: February 05, 2006, 02:39:18 PM by Borek »
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infinity1

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Re:balanced equation?
« Reply #2 on: February 05, 2006, 03:21:47 PM »
Would it look like this:

2 C6H5COOH --> C6H5COOH + NaOH

I did not add water in because both this and CH2Cl2 were removed in order for the titration to proceed, so they don't reallly belong as part of the reaction.
« Last Edit: February 05, 2006, 03:23:08 PM by infinity1 »

Offline Borek

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Re:balanced equation?
« Reply #3 on: February 05, 2006, 03:34:07 PM »
Where is a salt?

What you have wrote is not a reaction equation, even skeletal.
« Last Edit: February 05, 2006, 03:36:47 PM by Borek »
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Offline plu

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Re:balanced equation?
« Reply #4 on: February 05, 2006, 04:32:47 PM »
The titration was a light pink, which indicated the acidity of the solution.

This completely depends on the indicator you are using.  Not all acidic solutions are light pink  :P
« Last Edit: February 05, 2006, 04:33:01 PM by plu »

Offline arnyk

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Re:balanced equation?
« Reply #5 on: February 05, 2006, 05:18:18 PM »
I'm a little rusty, but I think the resultant salt produced is a common food preservative?

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Re:balanced equation?
« Reply #6 on: February 05, 2006, 05:27:37 PM »
I'm a little rusty, but I think the resultant salt produced is a common food preservative?

Not sure if it is still in use, but I remember jars with statement "conserved with ..." from my childhood.
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Offline arnyk

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Re:balanced equation?
« Reply #7 on: February 05, 2006, 05:59:57 PM »
I guess Canada has less stringent food additive rules. :)

Offline Borek

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Re:balanced equation?
« Reply #8 on: February 05, 2006, 06:03:37 PM »
I guess Canada has less stringent food additive rules. :)

Compared to Polish ones ;) ?
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infinity1

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Re:balanced equation?
« Reply #9 on: February 05, 2006, 07:20:49 PM »
Where is a salt?

What you have wrote is not a reaction equation, even skeletal.


Then how would you suggest I write it? I have listed every compound used in the experiment. They are C6H5COOH, H2O, NaOH, and CH2Cl2. The salt is NaOH, so I do not know what else you are looking for.

Can someone please guide me through this with constructive suggestions? Thank you.
« Last Edit: February 05, 2006, 07:22:24 PM by infinity1 »

infinity1

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Re:balanced equation?
« Reply #10 on: February 05, 2006, 07:25:55 PM »
This completely depends on the indicator you are using.  Not all acidic solutions are light pink  :P

Yes, that is true. This is why I said in my first post that I did a titration of C6H5COOH using NaOH. I did not use a standard pH indicator.

infinity1

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Re:balanced equation?
« Reply #11 on: February 06, 2006, 12:10:09 PM »
Does anyone know how to do this problem???

I asked a serious question and this thread went completely off base. Someone please provide some constructive guidance.

Offline Borek

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Re:balanced equation?
« Reply #12 on: February 06, 2006, 01:04:35 PM »
The salt is NaOH, so I do not know what else you are looking for.

NaOH is not a salt. It is very basic fact.
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Offline arnyk

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Re:balanced equation?
« Reply #13 on: February 06, 2006, 01:43:05 PM »
NaOH is not a salt. It is very basic fact.

Chemical pun?  Nice.  :D

infinity can you determine the products from this neutralization reaction:

C6H5COOH + NaOH -->

 


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