Refer back to the standard curve that you built previously (absorbance vs. concentration) The pH of...
Refer back to the standard curve that you built previously (absorbance vs. concentration)
The pH of a solution describes the concentration of H+ in a solution, where pH = -log[H+]. Note that this is a log10, not the natural log, so the inverse is [H+] = 10-pH. Acetic acid dissociates in water according to the following reaction:
-+CH3COOH (aq) ⇄ CH3COO (aq) + H (aq)
The pH of a 1.0 M solution of acetic acid is 2.37. What is the value of the equilibrium constant for the dissociation of acetic acid?
The equation of the standard curve I have is y = .027x+.0373
Homework Answers
concentration = 1.0 M
pH = 2.37
[H+] = 10^-pH
= 10^-2.37
= 4.266 x 10^-3 M
CH3COOH ------------> CH3COO- (aq) + H+
1.0 0 0
1.0 - x x x
x = [H+] = 4.266 x 10^-3
Ka = x^2 / 1.0 - x
= (4.266 x 10^-3)^2 / 1 - 4.266 x 10^-3
Ka = 1.8 x 10^-5
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Refer back to the standard curve that you built previously
(absorbance vs. concentration)
The pH of...
The pH of a solution describes the concentration of H+ in a solution, where pH =...
The pH of a solution describes the concentration of H+ in a solution, where pH = -log[H+]. Note that this is a log10, not the natural log, so the inverse is [H+] = 10-pH. Acetic acid dissociates in water according to the following reaction: -+CH3COOH (aq) ⇄ CH3COO (aq) + H (aq) The pH of a 1.0 M solution of acetic acid is 2.37. What is the value of the equilibrium constant for the dissociation of acetic acid?
A Bill' external standard curve built from absorbance signal vs. analyte concentration (in uM) has the...
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I need help finding calculated pH for part IV and part V
please!
pKa
of acetic acid= 4.744
su 13.21 Part IV: Dilution of Buffered and Unbuffered Solutions Calculated pH | Calculated ApH Observed pH Observed ApH Number Preparation 15 ml. HC H3O2(aq) 15 ml NaC,HO2(aq) 5 ml Solution 1 25 mL H20 5 ml Solution 2 25 ml H20 4 30 mL HC H2O2(aq) 5 ml Solution 4 25 ml H2O 5 ml Solution 5 25 ml. H2O 4.10...
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acidity and what are the compounds controlling it?
Acidity is a measure of
the concentration of hydrogen ions (H+ or protons) in a solution. We
use pH (potential of H+) as a scale of acidity and this can be
calculated as below:
pH =
-log10[H+] =
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(1/[H+])
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