HA(aq) + OH(aq) - H,O(l) + A(aq) late the pKa value of the acid, and determine the number of moles of acid initially = initial amount: n the reaction is complete, what is the concentration ratio njugate base to acid? [A-] [HA] =

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< Question 16 of 19 >
Strong base is dissolved in 615 mL of 0.200 M weak acid (Ka = 3.46 x 10-5) to make a buffer with a pH of 3.97. Assume that
the volume remains constant when the base is added.
HA(aq) + OH(aq) → H₂O(l) + A¯(aq)
Calculate the pKa value of the acid, and determine the number of moles of acid initially present.
pK₁ =
initial amount:
mol HA
When the reaction is complete, what is the concentration ratio
of conjugate base to acid?
[A-]
[HA]
How many moles of strong base were initially added?
amount added:
O
III
66°F
O
1)
mol OH
J
5:55 PM
6/2/2022
Transcribed Image Text:< Question 16 of 19 > Strong base is dissolved in 615 mL of 0.200 M weak acid (Ka = 3.46 x 10-5) to make a buffer with a pH of 3.97. Assume that the volume remains constant when the base is added. HA(aq) + OH(aq) → H₂O(l) + A¯(aq) Calculate the pKa value of the acid, and determine the number of moles of acid initially present. pK₁ = initial amount: mol HA When the reaction is complete, what is the concentration ratio of conjugate base to acid? [A-] [HA] How many moles of strong base were initially added? amount added: O III 66°F O 1) mol OH J 5:55 PM 6/2/2022
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