Homework Help is Here – Start Your Trial Now!
Science
Chemistry
Which buffer system is the best choice to create a buffer with pH = 7.30 ? HCIO2/KCIO2 HC2H3O2/KC2H3O2 NH3/NHẠC1 HCIO/KCIO Previous Answers Correct The effective range for a buffering system is one pH unit on either side of pKa . Therefore, calculate the pKa for each buffer system. For HC2H302/KC2H302 pKa - log Ka - log(1.8 x 10-5 4.74 For HCIO2/KCIO2 ,pKa = 1.96 ; for HCIO/KCIO , pKa = 7.54 ; and, for NH3/NHẠC1 pka = 14.00 – pKb = 14.00 – 4.754 9.25 So, HCIO/КCIO is the best choice to create a buffer with pH = 7.30 because HCIO has the pKa value that is closest to 7.30. Part B For the best system, calculate the ratio of the masses of the buffer components required to make the buffer. Express your answer to two significant figures.

Which buffer system is the best choice to create a buffer with pH = 7.30 ? HCIO2/KCIO2 HC2H3O2/KC2H3O2 NH3/NHẠC1 HCIO/KCIO Previous Answers Correct The effective range for a buffering system is one pH unit on either side of pKa . Therefore, calculate the pKa for each buffer system. For HC2H302/KC2H302 pKa - log Ka - log(1.8 x 10-5 4.74 For HCIO2/KCIO2 ,pKa = 1.96 ; for HCIO/KCIO , pKa = 7.54 ; and, for NH3/NHẠC1 pka = 14.00 – pKb = 14.00 – 4.754 9.25 So, HCIO/КCIO is the best choice to create a buffer with pH = 7.30 because HCIO has the pKa value that is closest to 7.30. Part B For the best system, calculate the ratio of the masses of the buffer components required to make the buffer. Express your answer to two significant figures.

Chemistry
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
See similar textbooks
icon
Related questions
Question

need help with part B

MISSED THIS? Read Section 18.3 (Pages 799 - 802) . The following table shows the values of ionization constants for a number of acids and bases at 25 °C : Which buffer system is the best choice to create a buffer with pH = 7.30 ? Formula Ка Kb HC1O2/KC1O2 HC2H302 1.8 × 10–5 HC102 HC2H302/KC2H3O2 1.1 x 10–2 NH3 1.76 × 10–5 NH3/NHẠC1 HCIO 2.9 × 10–8 HC10/KCIO Submit Previous Answers v Correct The effective range for a buffering system is one pH unit on either side of pKa . Therefore, calculate the pKa for each buffer system. For HC2H3O2/KC2H3O2 - log Ka - log(1.8 x 10-9 pKa 4.74 For HC102/KC1O2 , pKa = 1.96 ; for HC10/KCIO , pKa= 7.54 ; and, for NH3/NH4C1 pKa = 14.00 — рКъ 14.00 – 4.754 9.25 So, HC10/KC1O is the best choice to create a buffer with pH = 7.30 because HC10 has the pKa value that is closest to 7.30. Part B For the best system, calculate the ratio of the masses of the buffer components required to make the buffer. Express your answer to two significant figures. i (3 ED ? Не Be m(KC10) = |0.578 m(HCIO) Submit Previous Answers Request Answer x Incorrect; Try Again; 2 attempts remaining
Transcribed Image Text:MISSED THIS? Read Section 18.3 (Pages 799 - 802) . The following table shows the values of ionization constants for a number of acids and bases at 25 °C : Which buffer system is the best choice to create a buffer with pH = 7.30 ? Formula Ка Kb HC1O2/KC1O2 HC2H302 1.8 × 10–5 HC102 HC2H302/KC2H3O2 1.1 x 10–2 NH3 1.76 × 10–5 NH3/NHẠC1 HCIO 2.9 × 10–8 HC10/KCIO Submit Previous Answers v Correct The effective range for a buffering system is one pH unit on either side of pKa . Therefore, calculate the pKa for each buffer system. For HC2H3O2/KC2H3O2 - log Ka - log(1.8 x 10-9 pKa 4.74 For HC102/KC1O2 , pKa = 1.96 ; for HC10/KCIO , pKa= 7.54 ; and, for NH3/NH4C1 pKa = 14.00 — рКъ 14.00 – 4.754 9.25 So, HC10/KC1O is the best choice to create a buffer with pH = 7.30 because HC10 has the pKa value that is closest to 7.30. Part B For the best system, calculate the ratio of the masses of the buffer components required to make the buffer. Express your answer to two significant figures. i (3 ED ? Не Be m(KC10) = |0.578 m(HCIO) Submit Previous Answers Request Answer x Incorrect; Try Again; 2 attempts remaining
Expert Solution
trending now

Trending now

This is a popular solution!

steps

Step by step

Solved in 2 steps with 2 images

SEE SOLUTIONCheck out a sample Q&A here
Blurred answer
Knowledge Booster
Acid-Base Titrations
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
Chemistry
Chemistry
ISBN:
9781305957404
Author:
Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:
Cengage Learning
Chemistry
Chemistry
Chemistry
ISBN:
9781259911156
Author:
Raymond Chang Dr., Jason Overby Professor
Publisher:
McGraw-Hill Education
Principles of Instrumental Analysis
Principles of Instrumental Analysis
Chemistry
ISBN:
9781305577213
Author:
Douglas A. Skoog, F. James Holler, Stanley R. Crouch
Publisher:
Cengage Learning
Organic Chemistry
Organic Chemistry
Chemistry
ISBN:
9780078021558
Author:
Janice Gorzynski Smith Dr.
Publisher:
McGraw-Hill Education
Chemistry: Principles and Reactions
Chemistry: Principles and Reactions
Chemistry
ISBN:
9781305079373
Author:
William L. Masterton, Cecile N. Hurley
Publisher:
Cengage Learning
Elementary Principles of Chemical Processes, Bind…
Elementary Principles of Chemical Processes, Bind…
Chemistry
ISBN:
9781118431221
Author:
Richard M. Felder, Ronald W. Rousseau, Lisa G. Bullard
Publisher:
WILEY
SEE MORE TEXTBOOKS