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| Ritterbruder |
 Posted: Wed Mar 26, 2008 7:21 pm Post subject: Help on a question |
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Carbonate is mixed with water inthe following reaction:
CO3-2 + H2O = 2OH + CO2
I have some questions that I need help on:
-What is the hydrogen-ion donor?
-What is the hydrogen-ion acceptor?
-What are the conjugate acid-base pairs?
Thanks |
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| ArezList |
| Posted: Thu Mar 27, 2008 4:59 am Post subject: |
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Forum Freshman
Joined: 22 Mar 2008
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I think
H+ donor: H2O
H+ acceptor: one of the oxygen in CO3-2 that has -1 negative charge
About Conjugate : don't know coz' the lose a O-2 but not just a proton.
I think the defination of conjugate acid/base means accept/lose H+ namely a proton.
Perhaps I'm wrong, if so correct me thanx. |
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| rdwan |
| Posted: Thu Mar 27, 2008 12:50 pm Post subject: the equation |
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Location: libya,benghazy
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| rdwan |
| Posted: Thu Mar 27, 2008 1:09 pm Post subject: |
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-o-c(=o)-o- + H-O-H ـ<ـــــــــــــــ O=C=O + O-H + O-H
SO the water is the H+ donor
and bicraonate is the acceptor
OH is conjugate base for weak acid water
CO2 is weak acid for strong base carbonate |
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| ArezList |
| Posted: Sat Mar 29, 2008 6:14 pm Post subject: |
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Joined: 22 Mar 2008
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But when I learned lewis acid tacher told us the defination is when only donate or accept a proton but not somethng else, like this case an oxygen?
Is the teacher wrong, if so I'm scared who I'm following with...... |
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| i_feel_tiredsleepy |
| Posted: Sat Mar 29, 2008 6:49 pm Post subject: |
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Joined: 21 Mar 2008
Posts: 376
Location: Montreal
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This is obviously a high school chemistry homework question don't answer it for him >.<
| ArezList wrote: |
But when I learned lewis acid tacher told us the defination is when only donate or accept a proton but not somethng else, like this case an oxygen?
Is the teacher wrong, if so I'm scared who I'm following with...... |
Hydrogen ion is often used synonymously with proton. |
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| rancidchickn |
| Posted: Sat Mar 29, 2008 7:17 pm Post subject: |
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| Quote: |
| But when I learned lewis acid tacher told us the defination is when only donate or accept a proton but not somethng else, like this case an oxygen? |
Bronsted-Lowry acid: H+ (proton) donor
Bronsted-Lowry base: H+ (proton) acceptor
Lewis acid: electron pair acceptor
Lewis base: electron pair donor |
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| ArezList |
| Posted: Sat Mar 29, 2008 7:29 pm Post subject: |
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Come on I don't mean the high school question as you thought.
Apparently i know H+ can be treat as proton. HAha
What may comfuse you might be that the the answer I gave previously. I'm askinging that isn't the co2 donate a oxygen(no charge) in the reaction? That's why I don't know how to answer about the "conjugdate pair"
Sorry for my low level of chem.. but please help obliterate my confusion. thanx |
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| i_feel_tiredsleepy |
| Posted: Sat Mar 29, 2008 7:50 pm Post subject: |
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Posts: 376
Location: Montreal
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| ArezList wrote: |
Come on I don't mean the high school question as you thought.
Apparently i know H+ can be treat as proton. HAha
What may comfuse you might be that the the answer I gave previously. I'm askinging that isn't the co2 donate a oxygen(no charge) in the reaction? That's why I don't know how to answer about the "conjugdate pair"
Sorry for my low level of chem.. but please help obliterate my confusion. thanx |
The hydrogen binds an oxygen on the carbonate which causes the oxygen to break its bond with the carbon, releasing them as a hydroxide (OH) molecule. So the oxygen isn't being donated to the water.
Edit: I wasn't critisizing anyone's level of chemistry, my own chemistry is fairly limited, especially when it leaves the field of organic chem. I was just pointing out that the OP had posted what is probably a question on his homework assignment so people shouldn't have given him the answer. He won't learn that way  . |
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| ArezList |
| Posted: Sat Mar 29, 2008 8:05 pm Post subject: |
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| so you mean firstly form a intermediate CO2--H+ then release a hydroxyl (OH) isn't it. Thanks for your help. |
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| ArezList |
| Posted: Thu Apr 10, 2008 12:38 am Post subject: |
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