Question

pH of 0.1 M NaHS is (Ka1 and Ka2 of H2S are 10-7
and 10-14)
- (1) 11.2
(3) 10.5
(4) 7
(2) 4​

Answer 1

Answer:

(4)7 :the answer of your question

Answer 2

The pH of 0.1 M NaHS is equal to 10.5.

• Salts that are produced by partial displacement of proton from their corresponding acids are called amphiprotic salts.
• Since NaHS is produced by partial displacement of proton from H2S , it is also an amphiprotic salt.
• pH of an amphiprotic salt = (pKa1 + pKa2)/2
• Substituting the values we get pH =10.5.