A buffer was made with HC2H3O2 and its conjugate base. What is the pH of the buffer if at equilibrium there was [HC2H3O2] = 0.5000 M and [C2H3021] = 0.7000 M and the Ka = 1.60 x 10-5 ? everything is based upon the acid dissolving in water: HC2H3O2 + H20 <-> C2H3O21 + H3o+1 [ Ka = solve for [H30*1] then put in the numbers Ka [ [H3O*1] =- [ [H30*1] = pH = - log

Fundamentals Of Analytical Chemistry
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Chapter14: Principles Of Neutralization Titrations
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Problem 14.32QAP
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A buffer was made with HC2H3O2 and its conjugate base. What is the pH of the buffer if at equilibrium there was
[HC2H3O2] = 0.5000 M and [C2H302ª] = 0.7000 M and the Ka = 1.60 x 10-5 ?
everything is based upon the acid dissolving in water:
HC2H3O2
+ H20 <-> C2H3O21 + H30*1
[
Ka =
[
solve for [H30*'] then put in the numbers
Ka [
(
[H3O+1] :
[
]
[H3O+'] =
pH = - log
d. HC6H6O61
f. SO3?
a. H30+1
b. Он1
c. H2C6H606
е. HSO31
-2
g. H2SO3
h. HC2H3O2
i. C2H3O21
j. H2S
k. HS-1
I. s2
m. HX
п. X-1
О. 1
р. 2
q. 3
r. 0.5000
s. 5.5 X 10-5
t. 3.5 X 10-4
u. 8.00 x 10-5
v. 1.75 x 10-6
w. 1.11 x 10-8
х. 5.5 х 102
y. 0.7000
z. 1.60 x 10-5
аа. 1.143 х 10-5
bb. 0.4900
сс. 1.104 х 10-5
dd. 0.7100
ее. 1.26 х 10-5 ff. 4.901
gg. 7.93
hh. 4.942
ii. 4.957
Transcribed Image Text:A buffer was made with HC2H3O2 and its conjugate base. What is the pH of the buffer if at equilibrium there was [HC2H3O2] = 0.5000 M and [C2H302ª] = 0.7000 M and the Ka = 1.60 x 10-5 ? everything is based upon the acid dissolving in water: HC2H3O2 + H20 <-> C2H3O21 + H30*1 [ Ka = [ solve for [H30*'] then put in the numbers Ka [ ( [H3O+1] : [ ] [H3O+'] = pH = - log d. HC6H6O61 f. SO3? a. H30+1 b. Он1 c. H2C6H606 е. HSO31 -2 g. H2SO3 h. HC2H3O2 i. C2H3O21 j. H2S k. HS-1 I. s2 m. HX п. X-1 О. 1 р. 2 q. 3 r. 0.5000 s. 5.5 X 10-5 t. 3.5 X 10-4 u. 8.00 x 10-5 v. 1.75 x 10-6 w. 1.11 x 10-8 х. 5.5 х 102 y. 0.7000 z. 1.60 x 10-5 аа. 1.143 х 10-5 bb. 0.4900 сс. 1.104 х 10-5 dd. 0.7100 ее. 1.26 х 10-5 ff. 4.901 gg. 7.93 hh. 4.942 ii. 4.957
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