Predicting the qualitative aciConsider the following data on some weak acids and weak bases:acidnamenitrous acidhydrocyanic acid HCN0.1 M KNO₂solution0.1 M NH Br0.1 M C₂H5NH3ClshiftUse this data to rank the following solutions in order of increasing pH. In other words, select a '1' next to the solution that will have the lowest pH, a '2' next tothe solution that will have the next lowest pH, and so on.0.1 M NaCNK₁formulaHNO₂ 4.5×1044.9 × 10 10Eeplanationcaps lockcontrolCheckchoose oneXpHchoose onechoose one!1choose oneQA1option3Z2nameK₁formulaammonia NH₂1.8x10-5ethylamine C₂H5NH₂ 6.4 x 10-4➤baseWS43XHcommandED*$4CRF%5© 2023 McGraw Hill LLC. All Rights Reserved. Terms of Use | Privacy Center | AccessibilityTVMacBook Pro806GYB&7HU*8NJ(9KMarO

Answer:For NH3:For C2H5NH2:For HNO2:For HCN:

Answered: Consider the following data on some…

Chemistry

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ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

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Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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Predicting the qualitative aci
Consider the following data on some weak acids and weak bases:
acid
name
nitrous acid
hydrocyanic acid HCN
0.1 M KNO₂
solution
0.1 M NH Br
0.1 M C₂H5NH3Cl
shift
Use this data to rank the following solutions in order of increasing pH. In other words, select a '1' next to the solution that will have the lowest pH, a '2' next to
the solution that will have the next lowest pH, and so on.
0.1 M NaCN
K₁
formula
HNO₂ 4.5×104
4.9 × 10 10
Eeplanation
caps lock
control
Check
choose one
X
pH
choose one
choose one
!
1
choose one
Q
A
1
option
3
Z
2
name
K₁
formula
ammonia NH₂
1.8x10-5
ethylamine C₂H5NH₂ 6.4 x 10-4
➤
base
W
S
4
3
X
H
command
E
D
*
$
4
C
R
F
%
5
© 2023 McGraw Hill LLC. All Rights Reserved. Terms of Use | Privacy Center | Accessibility
T
V
MacBook Pro
80
6
G
Y
B
&
7
H
U
*
8
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9
K
M
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O

Expert Solution

Step 1: Calculation for pKa and pKb values

Answer:

For NH₃:

$pK subscript straight b equals negative logK subscript straight b pK subscript straight b equals negative log left parenthesis 1.8 cross times 10 to the power of negative 5 end exponent right parenthesis pK subscript straight b equals 4.74$

For C₂H₅NH₂:

$pK subscript straight b equals negative logK subscript straight b pK subscript straight b equals negative log left parenthesis 6.4 cross times 10 to the power of negative 4 end exponent right parenthesis pK subscript straight b equals 3.2$

For HNO₂:

$pK subscript straight a equals negative logK subscript straight a pK subscript straight a equals negative log left parenthesis 4.5 cross times 10 to the power of negative 4 end exponent right parenthesis pK subscript straight a equals 3.35$

For HCN:

$pK subscript straight a equals negative logK subscript straight a pK subscript straight a equals negative log left parenthesis 4.9 cross times 10 to the power of negative 10 end exponent right parenthesis pK subscript straight a equals 9.3$

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