Question

Aqueous solutions of HNO3,KOH,CH3COOH and CH3COONa of identical concentration are provided. The pair of solutions which form a buffer upon mixing is
A).HNO3 and CH3COOH
B).KOH & CH3COONa
C).HNO3 & CH3COONa
D).CH3COOH & CH3COONa

Answer 1

@parthkohli

Answer 2

I got only 1 ans.

Answer 3

That is D).

Answer 4

Why not C?

Answer 5

Bcoz the question says that concentrations are same..

Answer 6

Entire hno3 will react with entire ch3coona to give ch3cooh

Answer 7

So what?
Imagine this: take two moles of CH3COONa and one mole of HNO3.

Answer 8

In the example u r giving we have 1 mol of ch3Coona still in the solution bt we don't have it in the question i asked.

Answer 9

When we don't have the concentration of the salt remaining in the solution, how come u can call it even a buffer solution!

Answer 10

Hmm? You just have to mix a lesser volume of HNO3 with CH3COONa.

Answer 11

Exactly that's the point here..
We want that slighly different conc of the two shud be there in order to have a buffer.

Answer 12

No, why?
Chal maan le the concentration is 1M.
Now take 2L of CH3COONa and 1L of HNO3. What do you get?

Answer 13

U r taking different concentrations here..
It will definitely work herr for buffer to exist..
U assume a case that they r both of 2M concentration.
Now tell me what do u get?

Answer 14

Accha,sorry sorry ..smjh aaya .

Answer 15

I thought u were taking diff concentration.
Ty anyways.

Answer 16

Yeah, just more volume of CH3COONa. Then you'll get a mixture of CH3COOH and CH3COONa. :)