Question

Table 5.1 Chemical formulas and acidity constants at 25°C of some important acids(a) Name Formula pKa1 pKa2 pKa3 pKa4 Hydrochloric acid HCl < 0 Sulfuric acid H2SO4 < 0 1.99 Hydronium ion H3O+ 0.00 14.00 Chromic acid H2CrO4 0.20 6.51 Oxalic acid (COOH)2 1.250 4.266 Sulfurous acid H2SO3 1.85 7.19 Ferric ion Fe3+ 2.02 3.73 9.25 7.70 Phosphoric acid H3PO4 2.148 7.198 12.375 Arsenic acid H3AsO4 2.20 7.01 11.80 Salicylic acid C6H4OHCOOH 2.972 13.7 Citric acid C3H4OH(COOH)3 3.128 4.761 6.396 Hydrofluoric acid HF 3.18 Benzoic acid C6H5COOH 4.20 Pentachlorophenol acid C6Cl5OH 4.7 Acetic acid CH3COOH 4.757 Propionic acid CH3CH2COOH 4.874 Carbonic acid H2CO3 6.352 10.329 Hydrogen sulfide H2S 7.02 17.4 Cupric ion Cu2+ 7.497 8.73 10.41 13.09 

          Table 5.1 Chemical formulas and acidity constants at 25°C of some important acids(a)

Name Formula pKa1 pKa2 pKa3 pKa4
Hydrochloric acid HCl < 0
Sulfuric acid H2SO4 < 0 1.99
Hydronium ion H3O+ 0.00 14.00
Chromic acid H2CrO4 0.20 6.51
Oxalic acid (COOH)2 1.250 4.266
Sulfurous acid H2SO3 1.85 7.19
Ferric ion Fe3+ 2.02 3.73 9.25 7.70
Phosphoric acid H3PO4 2.148 7.198 12.375
Arsenic acid H3AsO4 2.20 7.01 11.80
Salicylic acid C6H4OHCOOH 2.972 13.7
Citric acid C3H4OH(COOH)3 3.128 4.761 6.396
Hydrofluoric acid HF 3.18
Benzoic acid C6H5COOH 4.20
Pentachlorophenol acid C6Cl5OH 4.7
Acetic acid CH3COOH 4.757
Propionic acid CH3CH2COOH 4.874
Carbonic acid H2CO3 6.352 10.329
Hydrogen sulfide H2S 7.02 17.4
Cupric ion Cu2+ 7.497 8.73 10.41 13.09
Show more…
Table 5.1 Chemical formulas and acidity constants at 25°C of some important acids(a) Name Formula pKa1 pKa2 pKa3 pKa4 Hydrochloric acid HCl < 0 Sulfuric acid H2SO4 < 0 1.99 Hydronium ion H3O+ 0.00 14.00 Chromic acid H2CrO4 0.20 6.51 Oxalic acid (COOH)2 1.250 4.266 Sulfurous acid H2SO3 1.85 7.19 Ferric ion Fe3+ 2.02 3.73 9.25 7.70 Phosphoric acid H3PO4 2.148 7.198 12.375 Arsenic acid H3AsO4 2.20 7.01 11.80 Salicylic acid C6H4OHCOOH 2.972 13.7 Citric acid C3H4OH(COOH)3 3.128 4.761 6.396 Hydrofluoric acid HF 3.18 Benzoic acid C6H5COOH 4.20 Pentachlorophenol acid C6Cl5OH 4.7 Acetic acid CH3COOH 4.757 Propionic acid CH3CH2COOH 4.874 Carbonic acid H2CO3 6.352 10.329 Hydrogen sulfide H2S 7.02 17.4 Cupric ion Cu2+ 7.497 8.73 10.41 13.09

Added by Ryan P.

Close

Chemistry: Structure and Properties
Chemistry: Structure and Properties
Nivaldo Tro 2nd Edition
AceChat toggle button
Close icon
Ace pointing down

Please give Ace some feedback

Your feedback will help us improve your experience

Thumb up icon Thumb down icon
Thanks for your feedback!
Profile picture
Table 5.1 Chemical formulas and acidity constants at 25°C of some important acids Name Formula pKa1 pKa2 pKa3 pKa4 Hydrochloric acid HCl < 0 Sulfuric acid H2SO4 < 0 1.99 Hydronium ion H3O+ 0.00 14.00 Chromic acid H2CrO4 0.20 6.51 Oxalic acid (COOH)2 1.250 4.266 Sulfurous acid H2SO3 1.85 7.19 Ferric ion Fe3+ 2.02 3.73 9.25 7.70 Phosphoric acid H3PO4 2.148 7.198 12.375 Arsenic acid H3AsO4 2.20 7.01 11.80 Salicylic acid C6H4OHCOOH 2.972 13.7 Citric acid C3H4OH(COOH)3 3.128 4.761 6.396 Hydrofluoric acid HF 3.18 Benzoic acid C6H5COOH 4.20 Pentachlorophenol acid C6Cl5OH 4.7 Acetic acid CH3COOH 4.757 Propionic acid CH3CH2COOH 4.874 Carbonic acid H2CO3 6.352 10.329 Hydrogen sulfide H2S 7.02 17.4 Cupric ion Cu2+ 7.497 8.73 10.41 13.09
Close icon
Play audio
Feedback
Powered by NumerAI
Danielle Fairburn Ivan Kochetkov
Jennifer Stoner verified

Sri K and 81 other subject Chemistry 101 educators are ready to help you.

Ask a new question
*

Labs

-

Want to see this concept in action?

NEW

Explore this concept interactively to see how it behaves as you change inputs.

View Labs
*

Key Concepts

-
Key Concept
Premium Feature
Explore the core concept behind this problem.
Play button
Key Concept
Premium Feature
Explore the core concept behind this problem.
Your browser does not support the video tag.
*

Recommended Videos

-
using-the-table_-determine-the-stronger-acid-from-the-following-pairs-of-acids-ka-values-for-substances-acting-as-weak-acids-25c-name-formula-pka-ka-hydrogen-sulfate-ion-hso4-200-10-10-phosp-13986

Using the table, determine the stronger acid from the following pairs of acids: Ka Values for Substances Acting as Weak Acids (25°C) Name Formula pKa Ka Hydrogen sulfate ion HSO4- 2.00 1.0 x 10^-2 Phosphoric acid H3PO4 2.12 7.5 x 10^-3 Hydrofluoric acid HF 3.19 6.5 x 10^-4 Nitrous acid HNO2 3.35 4.5 x 10^-4 Formic acid HCOOH 3.74 1.8 x 10^-4 Lactic acid CH3CH(OH)COOH 3.85 1.4 x 10^-4 Acetic acid CH3COOH 4.76 1.75 x 10^-5 Carbonic acid H2CO3 6.35 4.5 x 10^-7 Dihydrogen phosphate ion H2PO4- 7.18 6.6 x 10^-8 Ammonium ion NH4+ 9.20 6.3 x 10^-10 Hydrocyanic acid HCN 9.21 6.2 x 10^-10 Bicarbonate ion HCO3- 10.32 4.8 x 10^-11 Hydrogen phosphate ion HPO4^2- 12.00 1.0 x 10^-12 Water H2O 15.74 1.8 x 10^-16

Suman K.
current-attempt-in-progress-use-the-table-bellow-to-find-all-the-acids-that-are-stronger-than-acetic-acid-and-weaker-than-formic-acid-kland-pk-values-for-weak-monoprotic-acids-at-25-name-of-44646

Use the table below to find all the acids that are stronger than acetic acid and weaker than formic acid. Ka and pKa Values for Weak Monoprotic Acids at 25 °C Name of Acid | Formula | Ka | pKa Iodic acid | HIO3 | 1.7 × 10^-1 | 0.77 Chloroacetic acid | HC2H2O2Cl | 1.4 × 10^-3 | 2.85 Nitrous acid | HNO2 | 4.6 × 10^-4 | 3.34 Hydrofluoric acid | HF | 3.5 × 10^-4 | 3.46 Cyanic acid | HOCN | 2 × 10^-4 | 3.7 Formic acid | HCHO2 | 1.8 × 10^-4 | 3.74 Barbituric acid | HC4H3N2O3 | 9.8 × 10^-5 | 4.01 Hydrazoic acid | HN3 | 2.5 × 10^-5 | 4.60 Acetic acid | HC2H3O2 | 1.8 × 10^-5 | 4.74 Butanoic acid | HC4H7O2 | 1.5 × 10^-5 | 4.82 Propanoic acid | HC3H5O2 | 1.3 × 10^-5 | 4.89 Hypochlorous acid | HOCl | 3.0 × 10^-8 | 7.52 Hydrocyanic acid | HCN | 4.9 × 10^-10 | 9.31

David C.
ubc-chem-acid-base-examples-calculate-the-ph-if-100-ml-of-0020-m-benzoic-acid-added-to-400-ml-of-0004-m-sodium-benzoate_-the-pka-of-benzoic-acid-is-420-ha-bntic-hao-hzot-etnicak-anion-crj-ot-23004

Calculate the pH if 10.0 mL of 0.020 M benzoic acid is added to 40.0 mL of 0.004 M sodium benzoate. The pKa of benzoic acid is 4.20. HA + H2O ⇌ H3O+ + A- benzoic acid benzoate anion Conj. acid/base pair Initial moles of benzoic acid, "HA" = CHA · VHA = (0.020M)(0.010L) = 2.0x10-4 moles Initial moles of benzoate anion, "A-" = CA- · VA- = (0.004M)(0.040L) = 1.6x10-4 moles Assuming there won't be much dissociation of the weak acid or protonation of the conjugate base, we can use the Henderson-Hasselbalch equation here. (There won't be much change because benzoic acid is a weak acid and we are mixing it with its conjugate base, so this assumption is ok) pH = pKa + log([A-] / [HA]) benzoate anion benzoic acid MUST be a conj. acid/base pair! ALWAYS when using H-H. pH = 4.20 + log(1.6x10-4 moles / VTOT / 2.0x10-4 moles / VTOT) pH = 4.20 + log(0.8) = 4.20 + (-0.0969) pH = 4.10 Is this a buffer? YES VTOT (total volume) terms cancel -> you CAN use moles in H-H (but NEVER in Ka eqn)

David C.
*

Recommended Textbooks

-
Chemistry: Structure and Properties

Chemistry: Structure and Properties

Nivaldo Tro 2nd Edition
achievement 1,377 solutions
Chemistry The Central Science

Chemistry The Central Science

Theodore L. Brown 14th Edition
achievement 1,661 solutions
Chemistry

Chemistry

Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste 10th Edition
achievement 1,454 solutions
*

Transcript

-
00:01 Hey everyone, the solution of this question is the dipeptide, dipeptide ala cys is the combination of two amino acids.
00:13 This is the combination of two amino acid...
Need help? Use Ace
Ace is your personal tutor. It breaks down any question with clear steps so you can learn.
Start Using Ace
Ace is your personal tutor for learning
Step-by-step explanations
Instant summaries
Summarize YouTube videos
Understand textbook images or PDFs
Study tools like quizzes and flashcards
Listen to your notes as a podcast
Continue solving this problem
Create a free account to:
  • View full step-by-step solution
  • Ask follow-up questions with Ace AI
  • Save progress and study later
Continue Free
Join the community

18,000,000+

Students on Numerade

Trusted by students at 8,000+ universities

Numerade

Get step-by-step video solution
from top educators

Continue with Clever
or



By creating an account, you agree to the Terms of Service and Privacy Policy
Already have an account? Log In

A free answer
just for you

Watch the video solution with this free unlock.

Numerade

Log in to watch this video
...and 100,000,000 more!


EMAIL

PASSWORD

OR
Continue with Clever