Question
In: Chemistry
A solution contains 1.5M sodium acetate. The pKa of acetic acid (a weak acid) is 4.76....
A solution contains 1.5M sodium acetate. The pKa of acetic acid (a weak acid) is 4.76. Calculate the fraction and percentage of the molecules existing in the unionized state.
Solutions
Expert Solution
CH3COO- + H2O --------------> CH3COOH + OH-
1.5 0 0
1.5 - x x x
Ka = x^2 / 1.5 - x
1.74 x 10^-5 = x^2 / 1.5 - x
x = 5.1x 10^-3
[OH-] = 5.1 x 10^-3 M
% un ionized = (5.1 x 10^-3 / 1.5 ) x 100
= 0.34 %
queen_honey_blossom answered 2 years agoRelated Solutions
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(a) how many moles of each component are in 50.0 mL of
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2. A buffer solution contains .120 M acetic acid and .150 M sodium acetate. (a) how...
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(a) how many moles of each component are in 50.0 mL of
solution?
(b) If you add 5.55 mL of .092 M NaOH to the solution in part
(a), how many moles of acetic acid, sodium acetate, and NaOH will
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(c) If you add .50 mL of .087 M HCl to the solution in part (a)
how many moles of acetic...
A 1 liter solution contains 0.487 M acetic acid and 0.365 M sodium acetate. Addition of...
A 1 liter solution contains 0.487 M
acetic acid and 0.365 M
sodium acetate.
Addition of 0.183 moles of hydrobromic
acid will:
(Assume that the volume does not change upon the addition of
hydrobromic acid.)
Raise the pH slightly
Lower the pH slightly
Raise the pH by several units
Lower the pH by several units
Not change the pH
Exceed the buffer capacity
A 1 liter solution contains 0.474 M
hydrocyanic acid and 0.356 M
potassium cyanide.
Addition of 0.391...
1. A 1.00 liter solution contains 0.38 M acetic acid and 0.49 M sodium acetate. If...
1. A 1.00 liter solution contains
0.38 M acetic acid and
0.49 M sodium acetate.
If 0.120 moles of calcium
hydroxide are added to this system, indicate whether the
following statements are true or false.
(Assume that the volume does not change upon the addition of
calcium hydroxide.)
A. The number of moles of
CH3COOH will remain the
same.
B. The number of moles of
CH3COO- will
decrease.
C. The equilibrium concentration of
H3O+ will decrease.
D. The pH will...
If pKa of weak acids are the following: pKa acetic acid = 4.75 pKa propionic acid...
If
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What is the order of acids with increasing acidity Determine
the pH of the following
A. 100 mL of benzoic acid solution 0.03M is mixed with 200 ml
water
B. 50 mL of sodium hydroxide solution 0.05 M is mived with 200
ml water
pH calculations, pKa of acetic acid = 4.76. A mixture of 100mL of 0.10 M acetic...
pH calculations, pKa of acetic acid = 4.76. A mixture of 100mL
of 0.10 M acetic acid with 100mL of 0.05M NaOH
A buffer contains 0.150M acetic acid and 0.105M in sodium acetate. a) Calculate the pH of...
A buffer contains 0.150M acetic acid and 0.105M in sodium
acetate.
a) Calculate the pH of the buffer.
b) What is the volume of 6.0M NaOH must be added to raise the pH
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c) Calculate the pH when 2.0 mL of 6.0M is added to 100.0 mL to
the buffer.
please show work. question is due before 11PM
In the solution containing both 0.10 M acetic acid and 0.10 M sodium acetate, the acetic...
In the solution containing both 0.10 M acetic acid and 0.10 M
sodium acetate, the acetic acid undergoes ionization. The chemical
equation for this ionization reaction is the same as for a solution
containing acetic acid alone. The difference is that the initial
concentration of acetate ion (before any ionization reaction
occurs) for the solution containing acetic acid alone is zero,
whereas the initial concentration of acetate ion is 0.10 M in your
solution containing both acetic acid and sodium...
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