Class 11 Exam > Class 11 Questions > What volume of 0.2 M NH4Cl solution should be...
Start Learning for Free
What volume of 0.2 M NH4Cl solution should be added to 100ml of0.1 M NH4OH solution to produce a buffer solution of pH= 8.7? Given: pK of NH4OH= 4.7 ; log 2 = 0.3 b 4 (A)50ml (B) 100ml · (C)200ml (D)noneofthese?
Most Upvoted Answer
What volume of 0.2 M NH4Cl solution should be added to 100ml of0.1 M N...
Community Answer
What volume of 0.2 M NH4Cl solution should be added to 100ml of0.1 M N...
Problem Statement:
Calculate the volume of 0.2 M NH4Cl solution required to be added to 100ml of 0.1 M NH4OH solution to form a buffer solution of pH= 8.7. Given, pK of NH4OH= 4.7 and log 2 = 0.3.
Solution:
1. Write the chemical equation for the reaction between NH4Cl and NH4OH:
NH4Cl + NH4OH → NH4+ + Cl- + H2O
2. Write the equation for the dissociation of NH4OH:
NH4OH ↔ NH4+ + OH-
3. Write the equation for the dissociation constant of NH4OH:
pK = -log(Ka) = 4.7
Ka = 10^-4.7
4. Calculate the concentration of NH4+ and OH- ions in the 0.1 M NH4OH solution:
[NH4+] = [OH-] = (0.1 M) / 2 = 0.05 M
5. Calculate the pH of the 0.1 M NH4OH solution:
pH = pK + log([NH4+]/[NH4OH])
pH = 4.7 + log(0.05/0.05)
pH = 4.7
6. Calculate the pH of the buffer solution:
pH = pK + log([NH4Cl]/[NH4OH])
8.7 = 4.7 + log([NH4Cl]/0.05)
log([NH4Cl]/0.05) = 4
[NH4Cl]/0.05 = 10^4
[NH4Cl] = 500 mM
7. Calculate the volume of 0.2 M NH4Cl solution required:
M1V1 = M2V2
(0.2 M)(V1) = (500 mM)(100 ml + V1)
V1 = 200 ml
Answer: The volume of 0.2 M NH4Cl solution required to be added to 100ml of 0.1 M NH4OH solution to form a buffer solution of pH= 8.7 is 200 ml. Therefore, the correct answer is option (C).
Calculate the volume of 0.2 M NH4Cl solution required to be added to 100ml of 0.1 M NH4OH solution to form a buffer solution of pH= 8.7. Given, pK of NH4OH= 4.7 and log 2 = 0.3.
Solution:
1. Write the chemical equation for the reaction between NH4Cl and NH4OH:
NH4Cl + NH4OH → NH4+ + Cl- + H2O
2. Write the equation for the dissociation of NH4OH:
NH4OH ↔ NH4+ + OH-
3. Write the equation for the dissociation constant of NH4OH:
pK = -log(Ka) = 4.7
Ka = 10^-4.7
4. Calculate the concentration of NH4+ and OH- ions in the 0.1 M NH4OH solution:
[NH4+] = [OH-] = (0.1 M) / 2 = 0.05 M
5. Calculate the pH of the 0.1 M NH4OH solution:
pH = pK + log([NH4+]/[NH4OH])
pH = 4.7 + log(0.05/0.05)
pH = 4.7
6. Calculate the pH of the buffer solution:
pH = pK + log([NH4Cl]/[NH4OH])
8.7 = 4.7 + log([NH4Cl]/0.05)
log([NH4Cl]/0.05) = 4
[NH4Cl]/0.05 = 10^4
[NH4Cl] = 500 mM
7. Calculate the volume of 0.2 M NH4Cl solution required:
M1V1 = M2V2
(0.2 M)(V1) = (500 mM)(100 ml + V1)
V1 = 200 ml
Answer: The volume of 0.2 M NH4Cl solution required to be added to 100ml of 0.1 M NH4OH solution to form a buffer solution of pH= 8.7 is 200 ml. Therefore, the correct answer is option (C).
Attention Class 11 Students!
To make sure you are not studying endlessly, EduRev has designed Class 11 study material, with Structured Courses, Videos, & Test Series. Plus get personalized analysis, doubt solving and improvement plans to achieve a great score in Class 11.
|
Explore Courses for Class 11 exam
|
|
Similar Class 11 Doubts
Top Courses for Class 11View all
What volume of 0.2 M NH4Cl solution should be added to 100ml of0.1 M NH4OH solution to produce a buffer solution of pH= 8.7? Given: pK of NH4OH= 4.7 ; log 2 = 0.3 b 4 (A)50ml (B) 100ml · (C)200ml (D)noneofthese?
Question Description
What volume of 0.2 M NH4Cl solution should be added to 100ml of0.1 M NH4OH solution to produce a buffer solution of pH= 8.7? Given: pK of NH4OH= 4.7 ; log 2 = 0.3 b 4 (A)50ml (B) 100ml · (C)200ml (D)noneofthese? for Class 11 2024 is part of Class 11 preparation. The Question and answers have been prepared according to the Class 11 exam syllabus. Information about What volume of 0.2 M NH4Cl solution should be added to 100ml of0.1 M NH4OH solution to produce a buffer solution of pH= 8.7? Given: pK of NH4OH= 4.7 ; log 2 = 0.3 b 4 (A)50ml (B) 100ml · (C)200ml (D)noneofthese? covers all topics & solutions for Class 11 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for What volume of 0.2 M NH4Cl solution should be added to 100ml of0.1 M NH4OH solution to produce a buffer solution of pH= 8.7? Given: pK of NH4OH= 4.7 ; log 2 = 0.3 b 4 (A)50ml (B) 100ml · (C)200ml (D)noneofthese?.
What volume of 0.2 M NH4Cl solution should be added to 100ml of0.1 M NH4OH solution to produce a buffer solution of pH= 8.7? Given: pK of NH4OH= 4.7 ; log 2 = 0.3 b 4 (A)50ml (B) 100ml · (C)200ml (D)noneofthese? for Class 11 2024 is part of Class 11 preparation. The Question and answers have been prepared according to the Class 11 exam syllabus. Information about What volume of 0.2 M NH4Cl solution should be added to 100ml of0.1 M NH4OH solution to produce a buffer solution of pH= 8.7? Given: pK of NH4OH= 4.7 ; log 2 = 0.3 b 4 (A)50ml (B) 100ml · (C)200ml (D)noneofthese? covers all topics & solutions for Class 11 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for What volume of 0.2 M NH4Cl solution should be added to 100ml of0.1 M NH4OH solution to produce a buffer solution of pH= 8.7? Given: pK of NH4OH= 4.7 ; log 2 = 0.3 b 4 (A)50ml (B) 100ml · (C)200ml (D)noneofthese?.
Solutions for What volume of 0.2 M NH4Cl solution should be added to 100ml of0.1 M NH4OH solution to produce a buffer solution of pH= 8.7? Given: pK of NH4OH= 4.7 ; log 2 = 0.3 b 4 (A)50ml (B) 100ml · (C)200ml (D)noneofthese? in English & in Hindi are available as part of our courses for Class 11.
Download more important topics, notes, lectures and mock test series for Class 11 Exam by signing up for free.
Here you can find the meaning of What volume of 0.2 M NH4Cl solution should be added to 100ml of0.1 M NH4OH solution to produce a buffer solution of pH= 8.7? Given: pK of NH4OH= 4.7 ; log 2 = 0.3 b 4 (A)50ml (B) 100ml · (C)200ml (D)noneofthese? defined & explained in the simplest way possible. Besides giving the explanation of
What volume of 0.2 M NH4Cl solution should be added to 100ml of0.1 M NH4OH solution to produce a buffer solution of pH= 8.7? Given: pK of NH4OH= 4.7 ; log 2 = 0.3 b 4 (A)50ml (B) 100ml · (C)200ml (D)noneofthese?, a detailed solution for What volume of 0.2 M NH4Cl solution should be added to 100ml of0.1 M NH4OH solution to produce a buffer solution of pH= 8.7? Given: pK of NH4OH= 4.7 ; log 2 = 0.3 b 4 (A)50ml (B) 100ml · (C)200ml (D)noneofthese? has been provided alongside types of What volume of 0.2 M NH4Cl solution should be added to 100ml of0.1 M NH4OH solution to produce a buffer solution of pH= 8.7? Given: pK of NH4OH= 4.7 ; log 2 = 0.3 b 4 (A)50ml (B) 100ml · (C)200ml (D)noneofthese? theory, EduRev gives you an
ample number of questions to practice What volume of 0.2 M NH4Cl solution should be added to 100ml of0.1 M NH4OH solution to produce a buffer solution of pH= 8.7? Given: pK of NH4OH= 4.7 ; log 2 = 0.3 b 4 (A)50ml (B) 100ml · (C)200ml (D)noneofthese? tests, examples and also practice Class 11 tests.
|
|
Explore Courses for Class 11 exam
|
|
Signup for Free!
Signup to see your scores go up within 7 days! Learn & Practice with 1000+ FREE Notes, Videos & Tests.
|
© EduRev
|
Education Revolution
|
Follow Us
|
Signup to see your scores
go up within 7 days!
Access 1000+ FREE Docs, Videos and Tests
Takes less than 10 seconds to signup