The concentration of ammonia in a cleaning product was determined by back titration. Firstly, 10.00 cm3 of the cleaning product was pipetted into a large conical flask, containing 250.00cm3 of 0.50 mol/l HCl to give Solution A. Following a period of reaction and shaking, 50.00cm3 of Solution A was removed and diluted to 250 cm3 with water in a volumetric flask to give Solution B. 20 cm3 samples of Solution B were titrated against 0.05 mol/l Na2CO3 solution, giving an average titre of 12.45 cm3 . i) Write equations for the reactions that have taken place. ii) Determine the concentration of NH3 in the original cleaning product in mol/l, g/l, ppm, and % w/v.
The concentration of ammonia in a cleaning product was determined by back titration. Firstly, 10.00 cm3 of the cleaning product was pipetted into a large conical flask, containing 250.00cm3 of 0.50 mol/l HCl to give Solution A. Following a period of reaction and shaking, 50.00cm3 of Solution A was removed and diluted to 250 cm3 with water in a volumetric flask to give Solution B. 20 cm3 samples of Solution B were titrated against 0.05 mol/l Na2CO3 solution, giving an average titre of 12.45 cm3 . i) Write equations for the reactions that have taken place. ii) Determine the concentration of NH3 in the original cleaning product in mol/l, g/l, ppm, and % w/v.
Principles of Modern Chemistry
8th Edition
ISBN:9781305079113
Author:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler
Publisher:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler
Chapter20: Molecular Spectroscopy And Photochemistry
Section: Chapter Questions
Problem 67CP
Related questions
Question
The concentration of ammonia in a cleaning product was determined by back titration.
Firstly, 10.00 cm3 of the cleaning product was pipetted into a large conical flask,
containing 250.00cm3 of 0.50 mol/l HCl to give Solution A.
Following a period of reaction and shaking, 50.00cm3 of Solution A was removed and
diluted to 250 cm3 with water in a volumetric flask to give Solution B.
20 cm3 samples of Solution B were titrated against 0.05 mol/l Na2CO3 solution, giving
an average titre of 12.45 cm3
.
i) Write equations for the reactions that have taken place.
ii) Determine the concentration of NH3 in the original cleaning product in mol/l,
g/l, ppm, and % w/v.
Expert Solution
This question has been solved!
Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.
This is a popular solution!
Trending now
This is a popular solution!
Step by step
Solved in 3 steps with 19 images
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, chemistry and related others by exploring similar questions and additional content below.Recommended textbooks for you
Principles of Modern Chemistry
Chemistry
ISBN:
9781305079113
Author:
David W. Oxtoby, H. Pat Gillis, Laurie J. Butler
Publisher:
Cengage Learning
Chemistry by OpenStax (2015-05-04)
Chemistry
ISBN:
9781938168390
Author:
Klaus Theopold, Richard H Langley, Paul Flowers, William R. Robinson, Mark Blaser
Publisher:
OpenStax
Principles of Modern Chemistry
Chemistry
ISBN:
9781305079113
Author:
David W. Oxtoby, H. Pat Gillis, Laurie J. Butler
Publisher:
Cengage Learning
Chemistry by OpenStax (2015-05-04)
Chemistry
ISBN:
9781938168390
Author:
Klaus Theopold, Richard H Langley, Paul Flowers, William R. Robinson, Mark Blaser
Publisher:
OpenStax