Refer to the titration curve below. Choose the best match for each statement. So
ID: 825408 • Letter: R
Question
Refer to the titration curve below. Choose the best match for each statement. Some answers will match more than one statement, select all correct matches. Some statements may not have an appropriate matching answer, choose no match for these.
pH for a solution of a weak acid
pH for a buffer with equal concentrations of a weak acid and the salt of the weak acid
pH = pKa of a weak acid
pH for a solution of the sodium salt of the weak acid
pH = 14-pKa of a weak acid
equivalence point where moles of strong base added is just equivalent to the moles of weak acid in the orignal sample
pH for a solution of strong base and the salt of a weak acid
buffer pH range for the weak acid and its salt
buffer with an excess of the weak acid as compared to the salt of the weak acid
buffer range where the pH of the buffer is less than the pka of the weak acid
buffer pH range with an excess of the salt of the weak acid as compared to the weak acid
buffer range where the pH of he buffer is greater than the pka of the weak acid
pH for a solution of a strong acid
equivalence point where moles of strong base added is just equivalent to the moles of strong acid in the orignal sample
pH for a solution of the sodium salt of a strong acid
no match
E through F
B
A
C
D
E through B
B through F
-1.2.3.4.5.6.7.8.pH for a solution of a weak acid
Read Answer Items for Question 3 -1.2.3.4.5.6.7.8.pH for a buffer with equal concentrations of a weak acid and the salt of the weak acid
Read Answer Items for Question 3 -1.2.3.4.5.6.7.8.pH = pKa of a weak acid
Read Answer Items for Question 3 -1.2.3.4.5.6.7.8.pH for a solution of the sodium salt of the weak acid
Read Answer Items for Question 3 -1.2.3.4.5.6.7.8.pH = 14-pKa of a weak acid
Read Answer Items for Question 3 -1.2.3.4.5.6.7.8.equivalence point where moles of strong base added is just equivalent to the moles of weak acid in the orignal sample
Read Answer Items for Question 3 -1.2.3.4.5.6.7.8.pH for a solution of strong base and the salt of a weak acid
Read Answer Items for Question 3 -1.2.3.4.5.6.7.8.buffer pH range for the weak acid and its salt
Read Answer Items for Question 3 -1.2.3.4.5.6.7.8.buffer with an excess of the weak acid as compared to the salt of the weak acid
Read Answer Items for Question 3 -1.2.3.4.5.6.7.8.buffer range where the pH of the buffer is less than the pka of the weak acid
Read Answer Items for Question 3 -1.2.3.4.5.6.7.8.buffer pH range with an excess of the salt of the weak acid as compared to the weak acid
Read Answer Items for Question 3 -1.2.3.4.5.6.7.8.buffer range where the pH of he buffer is greater than the pka of the weak acid
Read Answer Items for Question 3 -1.2.3.4.5.6.7.8.pH for a solution of a strong acid
Read Answer Items for Question 3 -1.2.3.4.5.6.7.8.equivalence point where moles of strong base added is just equivalent to the moles of strong acid in the orignal sample
Read Answer Items for Question 3 -1.2.3.4.5.6.7.8.pH for a solution of the sodium salt of a strong acid
Read Answer Items for Question 3 Answer 1.no match
2.E through F
3.B
4.A
5.C
6.D
7.E through B
8.B through F
Explanation / Answer
(1) The given titration curve is between acid and base. Therefore 1st pH at point A is the pH of weak acid sample when titrant base is not added.
(2) pH for a buffer with equal concentrations of a weak acid and the salt of the weak acid = half of equivalance point where [A^-] = [HA] t= point B
(3) pH = pKa of a weak acid= [A^-] = [HA] =point B
(4)pH for a solution of the sodium salt of the weak acid = point D where solution is ionized and no further rise in pH.
(5) pH = 14-pKa of a weak acid = At the equivalance point = at point C
(6)equivalence point where moles of strong base added is just equivalent to the moles of weak acid in the orignal sample= At the equivalance point= point C
(7) pH for a solution of strong base and the salt of a weak acid = B through F after half equivalace point Strong base is dominating over weak acid.
(8) buffer pH range for the weak acid and its sal= E through F
(9) buffer with an excess of the weak acid as compared to the salt of the weak acid= E through B (Buffer pH range More towards initial pH)
(10)buffer range where the pH of the buffer is less than the pka of the weak acid= E to B (Buffer pH range More towards initial pH)
(11) buffer pH range with an excess of the salt of the weak acid as compared to the weak acid = B through F (Buffer pH range away from initial pH)
(12) buffer range where the pH of he buffer is greater than the pka of the weak acid = B through F Buffer pH range away from initial pH)
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