Calculate the pH and concentration of species present in a polyprotic acid solution. For a 7.23x10-² M solution of H₂CO3, calculate both the pH and the CO3²- ion concentration. H₂CO3 + H₂O = HCO3 + H₂0 ⇒ H3O+ + HCO3- Kal 4.2x10-7 H3O+ + CO3²- Kaz = 4.8x10-11 = pH = [CO3²-] = 3

Calculate the pH and concentration of species present in a polyprotic acid solution. For a 7.23x10-² M solution of H₂CO3, calculate both the pH and the CO3²- ion concentration. H₂CO3 + H₂O = HCO3 + H₂0 ⇒ H3O+ + HCO3- Kal 4.2x10-7 H3O+ + CO3²- Kaz = 4.8x10-11 = pH = [CO3²-] = 3

Chemistry: Principles and Practice

3rd Edition

ISBN:9780534420123

Author:Daniel L. Reger, Scott R. Goode, David W. Ball, Edward Mercer

Publisher:Daniel L. Reger, Scott R. Goode, David W. Ball, Edward Mercer

Chapter15: Solutions Of Acids And Bases

Section: Chapter Questions

Problem 15.43QE

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Concept explainers

Acid Base Titration

An acid-base titration is the method of quantitative analysis for determining the concentration of an acid and base by exactly neutralizing it with a standard solution of base or acid having known concentration.

Question

Calculate the pH and concentration of species present in a polyprotic acid solution.
For a 7.23x10-² M solution of H₂CO3, calculate both the pH and the CO3²- ion concentration.
H₂CO3 + H₂O — H3O+ + HCO3¯ Kal
HCO3 + H₂0
H3O+ + CO3²- Kaz
4.2x10-7
= 4.8x10-11
=
pH =
[CO3²-] =
3

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