Chemical Forums
Chemistry Forums for Students => High School Chemistry Forum => Topic started by: huskywolf on December 09, 2009, 02:26:37 PM
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Question 1.
What are the following conjugate bases?
a. H2O
b. CH3COOH
c. HS-
d. NH4+
I THINK ONLY c. IS THIS CORRECT?
what are the following conjugate acids?
e.NH3
f.S2-
g.CO32-
h.NH2-
I DONT SEE ANY?
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What definition of acid and base are you using?
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Just a clarification- you mean What are... OR Which of these are... ?
I'm assuming the meaning of questions as -- Which of the below chemicals can be conjugate _______ of some others.
Question 1.
What are the following conjugate bases?
a. H2O
b. CH3COOH
c. HS-
d. NH4+
I think A,B and C can be conjugate bases of some other chemicals but not NH4+
what are the following conjugate acids?
e.NH3
f.S2-
g.CO32-
h.NH2-
All the four are correct
{OR is it that For which of these chemicals conjugate _______ exist}
Surely one has to use BRONSTED theory in order to talk of Conjugate Acids/Bases
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Hello,Thanks for the reply
The question on the paper does not say 'which'
It says
What are the conjugate bases of each of the following?
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Remove H+ from each you'll get Conjugate base
and add H+ to each in next Q you'll have Conjugate acid
What's problem with that.. I can't understand
:D
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It makes sense now thanks
I thought it meant pick out the conjugate acids or bases as they are just by looking at the question
not actually + or - H
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one more question
should I include the little delta beside the + or - when indicating for conjugate acids or bases
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No delta means a partial charge
But + without delta means charge on electron
H+ is formed from H by losing one electron
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Ok thanks
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My exam is next week and I want to be certain I understand these correctly please tell me if these are the correct answers
Question 1.
What are the following conjugate bases of each of these?
a. H2O=HO-
b. CH3COOH=CH3OO-
c. HS-=S-2
d. NH4+=NH3-
IS THIS CORRECT?
what are the following conjugate acids?
e.NH3=NH4+
f.S2-=HS2+
g.CO32-=HCO3+ or no H?
h.NH2-=NH3+
Please answer soon ;)
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d. NH4+=NH3-
f.S2-=HS2+
g.CO32-=HCO3+
h.NH2-=NH3+
You went wrong with the charge in the above answers. No probs try again
Pls again read this
Remove H+ from each you'll get Conjugate base
and add H+ to each in next Q you'll have Conjugate acid
Treat the atoms and charge seperately.
i.e, to get conjugate base remove a H and also a +ve charge.
Try the above again and post. We'll see :D
Also pls use subscripts and superscripts often lest you may confuse charge with atoms
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Hello,
D= NH3
F=HS2
G=HCO3
H=NH3
??
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F=HS2
G=HCO3
You seem to have difficulties with charge. Do the following it may clear the concepts a bit.
OK what is the equation of addition of H+ toS2-?
S2- + H+ :rarrow: HS?? -
Fill in the charge so that net charge on LHS is equal to that on the RHS
Similarly for the other one..
CO32- + H+ :rarrow: HCO3??
Please write such equations for all others which you've got correct so that you may not confuse on some other question :)
And all the best for your exam. Prepare well ;D
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I'm not sure ???
F=HS-
G=HCO3-
but these would not be acids then?
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I'm not sure ???
F=HS-
G=HCO3-
but these would not be acids then?
Why do you feel they are not now acids?
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I'm not sure ???
F=HS-
G=HCO3-
but these would not be acids then?
Why do you feel they are not now acids?
Oh I see they still have a H to donate, but is the answer correct?
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Yes the answer is correct.
if you have any confusion just write down the equations. It'll be clear :)
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Thanks for your help :)