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WorksheetsAcid base buffers, titrations and Ksp F23
Total questions: 12
Worksheet time: 28mins
Which of the following combinations will form a buffer solution? Select all that apply.
HCOOH and LiCOOH
NH3 and NH4Br
KOH and KF
HCl and RbOH
What is the pH of a buffer mixture of 0.70 M KCH3COO and 0.50 M CH3COOH (Ka = 1.8x10-5)?
0.30
4.89
4.60
4.74
0.45
Which is the net ionic equation when NaOH(aq) is added to HF(aq) ?
H+ + OH- → H2O
HF + NaOH → H2O + NaF
HF + OH- → H2O + F-
F- + NaOH → OH- + NaF
What is the volume of NaOH at the equivalence point if 50.0 mL of 0.100 M HCl is titrated by 0.200 M NaOH. ?
25.0 mL
50.0 mL
1.00x102 mL
75.0 mL
When HCOOH(aq) is titrated by RbOH(aq), what is the pH at the equivalence point and why does this occur?
pH > 7 because there is excess NaOH.
pH < 7 because an acidic salt forms.
pH = 7 because a neutral salt forms.
pH > 7 because a basic salt forms.
What is the primary hydrolysis reaction at the equivalence point when HF(aq) is titrated by NaOH(aq)?
HF + NaOH --> NaF + H2O(l)
F-(aq) + H2O(l) --> HF(aq) + OH-(aq)
HF(aq) + H2O(l) --> F-(aq) + H3O+(aq)
Na+(aq) + H2O(l) --> NaOH + H+(aq)
Which point on the titration curve corresponds to the point at which the moles of the added strong base are equal to the moles of the weak acid initially present? (The points from lowest pH to highest are P, Q, R, S and T)
Q
R
S
T
Which acid base pair produced this titration curve?
HCI + KOH
HCI + NH3
CH3COOH + KOH
CH3COOH + NH3
Titration of a strong acid by a strong base
Titration of a weak acid by a strong base
Titration of a strong base by a strong acid
Titration of a weak base by a strong acid
Which curve is produced by the addition of a strong acid to a strong base?
A
B
C
D
What is the molar solubility of MX2 (Ksp = 8.0x10-25)? Assume M has a +2 charge.
5.8x10-9
2.0x10-72
8.0x10-25
8.9x10-13
7.4x10-9
Which of the following solutions will decrease the solubility of a saturated solution of Ag3PO4? Select all that apply.
HBr
AgNO3
KOH
K3PO4
