Q.
Dissociation constants of two acids HA and HB are respectively 4 × 10-10 and 4 × 10-5, whose pH value will be higher for a given molarity
see full answer
Talk to JEE/NEET 2025 Toppers - Learn What Actually Works!
Real Strategies. Real People. Real Success Stories - Just 1 call away
An Intiative by Sri Chaitanya
a
HA
b
HB
c
Both same
d
Can't say
answer is A.
(Unlock A.I Detailed Solution for FREE)
Ready to Test Your Skills?
Check your Performance Today with our Free Mock Test used by Toppers!
Take Free Test
Detailed Solution
HA ⇌ H++A-HB ⇌ H++B-For HAKa = α2Cα1 = Ka1C = 4 × 10-101α1 = 2 × 10-5 for C = 1 MSimilarly ⇒ H+ = Cα = 2 × 10-5 ; pH =-log [H+] = 4.7For HB: α2 = Ka2C = 1.8 × 10-51 for C = 1 Mα2 = 4.2 × 10-3 ⇒ H+=Cα = 4.2 × 10-3 pH =-log 4.2 × 10-3 = 2.37 ; PH of HA>HB
Watch 3-min video & get full concept clarity