| ⇦ | 
| ⇨ |
40 mL of 0.1 M ammonia solution is mixed with 20 mL of 0.1 M HCl. What is the pH of the mixture? ( pKb of ammonia solution is 4.74)
Options
(a) 4.74
(b) 2.26
(c) 9.26
(d) 5
Correct Answer:
9.26
Explanation:
40mL of 0.1 M ammonia solution = 40×0.1
= 4 milli equivalent ammonia solution,
20 mL of 0.1 M HCl = 20×0.1,
= 2 milliequivalent of HCl,
NH₄OH + HCl → NH₄Cl + H₂O. Initial milli.eqv. 4 2 0. Milli-eqv.after 4-2 0 2 reaction = 2. Therefore pOH = pK(b) + log[NH₄Cl]/NH₄OH] = 4.74 + log2/2
= 4.74 + log 1 = 4.74.
Therefore pH = 14 – 4.74 = 9.26.
Related Questions: - In laboratory burners , we use
- Bithional is generally added to the soaps as an additive to function as a
- The compound that gives both iodoform and Fehling’s tests is
- Which of the following technique is most suitable for purification of cyclo
- The compound benzophenone(C₆H₅COC₆H₅) does not reacts with
Topics: Equilibrium
(104)
Subject: Chemistry
(2512)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- In laboratory burners , we use
- Bithional is generally added to the soaps as an additive to function as a
- The compound that gives both iodoform and Fehling’s tests is
- Which of the following technique is most suitable for purification of cyclo
- The compound benzophenone(C₆H₅COC₆H₅) does not reacts with
Topics: Equilibrium (104)
Subject: Chemistry (2512)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
18000+ students are using NEETLab to improve their score. What about you?
Solve Previous Year MCQs, Mock Tests, Topicwise Practice Tests, Identify Weak Topics, Formula Flash cards and much more is available in NEETLab Android App to improve your NEET score.
Share this page with your friends
Leave a Reply