Hi,

1. Which of the following form conjugate acid - base pairs in the right order?
(A) NaCl + NaOH
(B) Borax + Boric Acid
(C) NaH₂PO₄
(D) NH₄Cl + NH₄OH

2. Which of the following form conjugate acid-base pairs in the right order?
(A) NH₃, NH₂
(B) OH^-, H₂O
(C) HCO₃^-, CO₂^-
(D) H₂S , HS^-

Can you please the answer to both the questions?  I always thought that a conjugate acid-base differ by a H, but the answers indicate otherwise.

thanks

To the moderator: sorry, it wont happen again. Anyway, i thoguhy it was ok to ask the 2 since they both wont take more than 10secs each.

 

 

nunoxic, you are corrrect.but one doubt, is B correct for the second question? isnt OH^- the conjugate base of H2O? I mean, they are a conjugate acid - base pair, but in the opposite order.  thanks! can u explain the first question?

1. None of these is an acid-base combination.

 

2. (d) H₂S, HS ^- is a conjugate acid-base pair in the right order.