Log in
Chemistry
1
answer
0
watching
501
views

A buffer contains a weak acid, HA, and its conjugate base. The weak acid has a pKa of 4.5, and the buffer has a pH of 4.3. Without doing a calculation, state which of these possibilities are correct. (a) [HA] = [A-], (b) [HA] ˃ [A-],

or (c) [HA] < [A-].

Watch
1
answer
0
watching
501
views

For unlimited access to Homework Help, a Homework+ subscription is required.

Sixta Kovacek
Sixta KovacekLv2
14 May 2020

Unlock all answers

Get 1 free homework help answer.
Already have an account? Log in
Share
discord banner image
Join us on Discord
Chemistry Study Group
Join now

Related textbook solutions

Basic Chemistry
5 Edition,
Timberlake
ISBN: 9780134138046
Principles of Chemistry Molecular Approach
4th Edition,
Tro
ISBN: 9780134112831
Principles of Chemistry Molecular Approach
3rd Edition, 2014
Tro
ISBN: 9780321971944
Chemistry: Structure and Properties
2nd Edition,
Tro
ISBN: 9780134293936
Chemistry: A Molecular Approach
3rd Edition,
Tro
ISBN: 9780321809247
Chemistry: A Molecular Approach
5th Edition,
Tro
ISBN: 9780134874371
Principles of Chemistry: A Molecular Approach
4th Edition,
Tro
ISBN: 9780134895741
Chemistry: The Central Science
14th Edition, 2017
Brown
ISBN: 9780134414232

Related questions

A buffer solution is made using a weak acid, HA, that has a pKa of6. If the pH of the buffer is 9, what is the ratio of A– toHA?

A-/HA=?

What is the pH of a solution which is 0.021 M in weak base and0.039 M in the conjugate weak acid (Ka = 7.1 × 10–6)?

pH=?

One student measure the pH of the following three solutions (weakbase, conjugate acid and buffer). Using this data, please calculatethe pKa and pKb. (show calculation).

pH = 8.7 for 0.010 M RNH 2 (weak base): pKb = ?





pH = 9.3 for 0.050 M NaA (conjugate base): pKb = ?




pH = 4.5 for a buffer of 0.20M acid HA and 0.10 M NaA (conjugatebase)


pKa = ________________________; PKb =_______________________________

Q5. Consider a buffer composed of the weak acid HA and its conjugate base A. Which pair of concentrations results in the most effective buffer? a) 0.10 M HA; 0.10 MA b) 0.50 M HA; 0.50 MA c) 0.90 M HA; 0.10 MA d) 0.10 M HA; 0.90 MA

Weekly leaderboard

Home
Homework Help 3,900,000
Chemistry 830,000
Start filling in the gaps now
Log in