[huskywolf]

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.CO₃^2-
h.NH^2-
I DONT SEE ANY?

[sjb]

What definition of acid and base are you using?

[savy2020]

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

[huskywolf]

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?

[savy2020]

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
 

[huskywolf]

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

[huskywolf]

one more question
should I include the little delta beside the + or - when indicating for conjugate acids or bases

[savy2020]

No delta means a partial charge
But + without delta means charge on electron
H+ is formed from H by losing one electron

[huskywolf]

Ok thanks

[huskywolf]

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.CO3^2-=HCO3⁺  or no H?
h.NH2-=NH3⁺

Please answer soon  

[savy2020]

d.              NH₄⁺=NH₃^-
f.S^2-=HS²⁺
g.CO₃^2-=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

Also pls use subscripts and superscripts often lest you may confuse charge with atoms

[huskywolf]

Hello,

D= NH₃
F=HS²
G=HCO₃
H=NH₃
??

[savy2020]

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⁺ toS^2-?
S^2- + H⁺  HS^?? -
Fill in the charge so that net charge on LHS is equal to that on the RHS

Similarly for the other one..
CO₃^2- + H⁺  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

[huskywolf]

I'm not sure 
F=HS^-
G=HCO₃^-

but these would not be acids then?

[sjb]

I'm not sure 
F=HS^-
G=HCO₃^-

but these would not be acids then?

Why do you feel they are not now acids?