Determine dissociation constant of a WA: given pH of the half-neutralized acid solution is pH=5.1: What is pKa and Ka? What is the unknown weak acid? Also given: NaHSO4 Ka = 1.2 x 10-2 KHC8H4O4 (KHP) Ka = 8.7 x 10-6
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Chemical equilibrium and ionic equilibrium are two major concepts in chemistry. Ionic equilibrium deals with the equilibrium involved in an ionization process while chemical equilibrium deals with the equilibrium during a chemical change. Ionic equilibrium is established between the ions and unionized species in a system. Understanding the concept of ionic equilibrium is very important to answer the questions related to certain chemical reactions in chemistry.
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Determine dissociation constant of a WA:
given pH of the half-neutralized acid solution is pH=5.1:
What is pKa and Ka? What is the unknown weak acid?
Also given:
NaHSO4 Ka = 1.2 x 10-2
KHC8H4O4 (KHP) Ka = 8.7 x 10-6
for context, earlier part of experiment was the below (may not be needed for problem)
Record the pH and the color observed with bromcresol green for each of the 0.1 M solutions that were tested.
|
|
NaCl |
Na2CO3
|
NaC2H3O2
|
NaHSO4
|
|
pH
|
7 |
11 |
8.0 |
1.9 |
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