Determine the pH of a Tris/TrisH* buffer solution by constructing an ICE table, writing the equilibrium constant expression, and using this information to determine the pH. The pka for TrisH* is 8.30. Complete Parts 1-3 before submitting your answer. Initial (M) 1 Tris buffers are solutions of tris (hydroxymethyl)aminomethane, a weak base of formula C4H₁1NO3, combined with its protonated form, TrisH+, HC4H₁NO3*. A buffer solution is prepared by mixing 50.00 mL of 0.250 M Tris solution with 50.00 mL of 0.200 M TrisH solution. Fill in the ICE table with the appropriate value for each involved species to determine concentrations of all reactants and products. Change (M) Equilibrium (M) 0.250 HC4H₁NO3+H₂O(1) H3O+ (aq) C4H₁NO3(ac 0.0125 - x 0 0.0100 - x 2 0.0125 0.0125 + x +X 0.0100 0.0125 - 2x 0.0100 + x Tap here or pull up for additional resources 3 0.0100 - 2x RESET 0.200 -X 0.0125 + 2x 0.0100 + 2x

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7:21
Initial (M)
Determine the pH of a Tris/TrisH* buffer solution
by constructing an ICE table, writing the
equilibrium constant expression, and using this
information to determine the pH. The pka for
TrisH* is 8.30. Complete Parts 1-3 before
submitting your answer.
Change (M)
Question 4 of 13
Equilibrium (M)
1
Tris buffers are solutions of
tris (hydroxymethyl)aminomethane, a weak base
of formula C4H₁1NO3, combined with its
protonated form, TrisH*, HC₂H₁NO3*. A buffer
solution is prepared by mixing 50.00 mL of
0.250 M Tris solution with 50.00 mL of 0.200 M
TrisH+ solution. Fill in the ICE table with the
appropriate value for each involved species to
determine concentrations of all reactants and
products.
0.250
2
0
0.0125
HC4H₁NO3+H₂O(l) = H₂O*(aq) H₁NO3(ac
+X
0.0100
Submit
3
0.0125 - x
0.0125 + x
0.0100 - x
0.0100 + x
0.0100 - 2x
Tap here or pull up for additional resources
0.0125 - 2x
RESET
0.200
-X
0.0125 + 2x
0.0100 + 2x
Transcribed Image Text:7:21 Initial (M) Determine the pH of a Tris/TrisH* buffer solution by constructing an ICE table, writing the equilibrium constant expression, and using this information to determine the pH. The pka for TrisH* is 8.30. Complete Parts 1-3 before submitting your answer. Change (M) Question 4 of 13 Equilibrium (M) 1 Tris buffers are solutions of tris (hydroxymethyl)aminomethane, a weak base of formula C4H₁1NO3, combined with its protonated form, TrisH*, HC₂H₁NO3*. A buffer solution is prepared by mixing 50.00 mL of 0.250 M Tris solution with 50.00 mL of 0.200 M TrisH+ solution. Fill in the ICE table with the appropriate value for each involved species to determine concentrations of all reactants and products. 0.250 2 0 0.0125 HC4H₁NO3+H₂O(l) = H₂O*(aq) H₁NO3(ac +X 0.0100 Submit 3 0.0125 - x 0.0125 + x 0.0100 - x 0.0100 + x 0.0100 - 2x Tap here or pull up for additional resources 0.0125 - 2x RESET 0.200 -X 0.0125 + 2x 0.0100 + 2x
7:21
Ka =
Determine the pH of a Tris/TrisH* buffer solution
by constructing an ICE table, writing the
equilibrium constant expression, and using this
information to determine the pH. The pka for
TrisH* is 8.30. Complete Parts 1-3 before
submitting your answer.
1
3
Based on your ICE table (Part 1) and the
definition of pKa, set up the expression for Ka in
order to determine the unknown. Each reaction
participant must be represented by one tile. Do
not combine terms.
[0.200]
[0.200 -x]
[0.0125 - 2x]
[0.0100 - 2x]
Question 4 of 13
-8.30
[0.250]
[0.250 + x]
[0.0125 + 2x]
[0.0100 + 2x]
5.01x 10-⁹
2
[0.0125]
[0.0125 -x]
[0.0100 -x]
9.12 x 10-²
[x]
=
Tap here or pull up for additional resources
Submit
RESET
[0.0100]
[0.0125 + x]
[0.0100 + x]
8.30
[-x]
Transcribed Image Text:7:21 Ka = Determine the pH of a Tris/TrisH* buffer solution by constructing an ICE table, writing the equilibrium constant expression, and using this information to determine the pH. The pka for TrisH* is 8.30. Complete Parts 1-3 before submitting your answer. 1 3 Based on your ICE table (Part 1) and the definition of pKa, set up the expression for Ka in order to determine the unknown. Each reaction participant must be represented by one tile. Do not combine terms. [0.200] [0.200 -x] [0.0125 - 2x] [0.0100 - 2x] Question 4 of 13 -8.30 [0.250] [0.250 + x] [0.0125 + 2x] [0.0100 + 2x] 5.01x 10-⁹ 2 [0.0125] [0.0125 -x] [0.0100 -x] 9.12 x 10-² [x] = Tap here or pull up for additional resources Submit RESET [0.0100] [0.0125 + x] [0.0100 + x] 8.30 [-x]
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