Question

A certain weak acid, HA, has a K_{a} value of
6.9x10^{-7}

1) Calculate the percent ionization of HA in a 0.10 M solution

Express your answer to two significant figures and include the appropriate units.

Value = Units =

2) Calculate the percent ionization of HA in a 0.010 M solution

Value = Units =

Answer #1

1)

HA < -- > H+ + A-

0.10 0 0 intial

0.10-x x x at equlibrium

since, x is very small for weak acid

0.10-x = 0.10

Ka = ([H+]*[A-])/[HA]

6.9*10^-7 = x^2/0.10

x^2 = 6.9*10^-8

x = 2.6*10^-4

%ionisation = {x/[HA]intial}*100

= {(2.6*10^-4)/0.10}*100

= 0.26% M-1

2)

HA < -- > H+ + A-

0.010 0 0 intial

0.010-x x x at equlibrium

since, x is very small for weak acid

0.010-x = 0.010

Ka = ([H+]*[A-])/[HA]

6.9*10^-7 = x^2/0.010

x^2 = 0.69*10^-8

x = 0.83*10^-4

%ionisation = {x/[HA]intial}*100

= {(0.83*10^-4)/0.010}*100

= 0.83% M-1

A certain weak acid, HA, has a Ka value of 7.4×10−7.
Part A Calculate the percent ionization of HA in a
0.10 M solution. Express your answer to two significant figures and
include the appropriate units. Part B Calculate
the percent ionization of HA in a 0.010 M solution. Express your
answer to two significant figures, and include the appropriate
units.

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3.5×10−7.
Part A
Calculate the percent ionization of HA in a 0.10 M
solution.
Express your answer to two significant figures and include the
appropriate units.
Part B
Calculate the percent ionization of HA in a 0.010 M
solution.
Express your answer to two significant figures, and include the
appropriate units.

A certain weak acid, HA , has a Ka value of
6.6×10−7.
Part A
Calculate the percent ionization of HA in a 0.10 M
solution.
Express your answer to two significant figures and include the
appropriate units.
Part B
Calculate the percent ionization of HA in a 0.010 M
solution.
Express your answer to two significant figures, and include the
appropriate units.

A certain weak acid, HA, has a Ka value of
1.4×10−7.
Part A
Calculate the percent ionization of HA in a 0.10 M
solution.
Express your answer to two significant figures and include the
appropriate units.
Part B is calculate the percent ionization of HA in a 0.010 M
solution.

A certain weak acid, HA, has a Ka value of
1.6×10−7.
Part A
Calculate the percent ionization of HA in a 0.10 M
solution.
Express your answer as a percent using two significant
figures.
Part B
Calculate the percent ionization of HA in a 0.010 M
solution.
Express your answer as a percent using two significant
figures.

A certain weak acid, HA, has a Ka value of 6.9×10−7.
Part A Calculate the percent ionization of HA in a 0.10 M
solution. Express your answer as a percent using two significant
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Part B Calculate the percent ionization of HA in a 0.010 M
solution. Express your answer as a percent using two significant
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A) Calculate the percent ionization of HA in a 0.10 M
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Include units, Thank you!

A certain weak acid, HA, has a Ka value of
9.5×10−7.
1. Calculate the percent ionization of HA in a 0.10 M
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2.Calculate the percent ionization of HA in a 0.010 M
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1. Calculate the percent ionization of HA in a 0.10 M
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2. Calculate the percent ionization of HA in a 0.010 M
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1. Calculate the percent ionization of HA in a 0.10 M
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2. Calculate the percent ionization of HA in a 0.010 M
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