A 1.5M-labeled HCI solution was standardized against 1g sodium carbonate Na₂CO3 (MW = 105.99 g/mol) following the chemical equation below. The Na₂CO3 standard required 12.7 mL of the HCI solution to completely react up to the indicator endpoint. Standardization reaction: 2HCI + Na₂CO3 -> H₂CO3 + 2NaCl After this, Carla and Marie both prepared their samples by taking 10.0-mL aliquots of each household ammonia solution and diluting them to 25.0 mL. Using the same titrant and indicator, Carla's ammonia solution (Brand A) required 20 mL of the standardized titrant. While Marie's ammonia solution (Brand B) required 45 mL of the same titrant. A. What is the exact concentration of the HCI titrant in molarity? B. What is the balanced chemical equation between the analyte and the titrant? What is the ammonia concentration of Carla's and Marie's samples in molarity? C. If the acceptable range of NH3 concentration for commercial household ammonia is 2.9-4.9M, which of the Brands can be sold commercially?
A 1.5M-labeled HCI solution was standardized against 1g sodium carbonate Na₂CO3 (MW = 105.99 g/mol) following the chemical equation below. The Na₂CO3 standard required 12.7 mL of the HCI solution to completely react up to the indicator endpoint. Standardization reaction: 2HCI + Na₂CO3 -> H₂CO3 + 2NaCl After this, Carla and Marie both prepared their samples by taking 10.0-mL aliquots of each household ammonia solution and diluting them to 25.0 mL. Using the same titrant and indicator, Carla's ammonia solution (Brand A) required 20 mL of the standardized titrant. While Marie's ammonia solution (Brand B) required 45 mL of the same titrant. A. What is the exact concentration of the HCI titrant in molarity? B. What is the balanced chemical equation between the analyte and the titrant? What is the ammonia concentration of Carla's and Marie's samples in molarity? C. If the acceptable range of NH3 concentration for commercial household ammonia is 2.9-4.9M, which of the Brands can be sold commercially?
Chemistry: The Molecular Science
5th Edition
ISBN:9781285199047
Author:John W. Moore, Conrad L. Stanitski
Publisher:John W. Moore, Conrad L. Stanitski
Chapter13: The Chemistry Of Solutes And Solutions
Section: Chapter Questions
Problem 95QRT
Related questions
Question
100%
Transcribed Image Text:I.
PROBLEM SOLVING Show complete solutions for each of the problems.
Express your final answers in 2 decimal places.
3. Household ammonia, NH3, are used as cleaning solutions manufactured by adding
ammonia gas to water and can be between 2.94 M and 5.87 M. Two students, Carla and
Marie, wish to determine concentration of NH3 present in Brand A and Brand B using
HCI.
A 1.5M-labeled HCI solution was standardized against 1g sodium carbonate Na₂CO3
(MW 105.99 g/mol) following the chemical equation below. The Na₂CO3 standard
required 12.7 mL of the HCI solution to completely react up to the indicator endpoint.
=
Standardization reaction:
2HCI + Na₂CO3 -> H₂CO3 + 2NaCl
After this, Carla and Marie both prepared their samples by taking 10.0-mL aliquots of
each household ammonia solution and diluting them to 25.0 mL. Using the same titrant
and indicator, Carla's ammonia solution (Brand A) required 20 mL of the standardized
titrant. While Marie's ammonia solution (Brand B) required 45 mL of the same titrant.
A. What is the exact concentration of the HCI titrant in molarity?
B. What is the balanced chemical equation between the analyte and the titrant?
What is the ammonia concentration of Carla's and Marie's samples in molarity?
C. If the acceptable range of NH3 concentration for commercial household ammonia is
2.9-4.9M, which of the Brands can be sold commercially?
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 3 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
Chemistry: The Molecular Science
Chemistry
ISBN:
9781285199047
Author:
John W. Moore, Conrad L. Stanitski
Publisher:
Cengage Learning
Principles of Modern Chemistry
Chemistry
ISBN:
9781305079113
Author:
David W. Oxtoby, H. Pat Gillis, Laurie J. Butler
Publisher:
Cengage Learning
Chemistry: The Molecular Science
Chemistry
ISBN:
9781285199047
Author:
John W. Moore, Conrad L. Stanitski
Publisher:
Cengage Learning
Principles of Modern Chemistry
Chemistry
ISBN:
9781305079113
Author:
David W. Oxtoby, H. Pat Gillis, Laurie J. Butler
Publisher:
Cengage Learning
Introductory Chemistry: An Active Learning Approa…
Chemistry
ISBN:
9781305079250
Author:
Mark S. Cracolice, Ed Peters
Publisher:
Cengage Learning
World of Chemistry, 3rd edition
Chemistry
ISBN:
9781133109655
Author:
Steven S. Zumdahl, Susan L. Zumdahl, Donald J. DeCoste
Publisher:
Brooks / Cole / Cengage Learning