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WorksheetsTitration and solubility equilibrium
Total questions: 15
Worksheet time: 9mins
What is the pH at the equivalence point?
The pH is approximately 5
The pH is approximately 6
The pH is approximately 8
The pH is approximately 9
What is the endpoint of a titration?
Where the amount of acid and base are equal as shown by a colour change
Where the amount of acid and base are equal
When the volume of base in the burette is used up
When there is no acid
Which type of titration is shown by this titration curve?
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
CH3COOH is titrated with NaOH. What is/are the product(s) and the pH at equivalence point? (Select all that apply)
CH3COONa, H2O
CH3COONa
pH 9
pH 5
pH 7
Which acid base pair produce the titration curve shown below?
HCI + KOH
HCI + NH3
CH3COOH + KOH
CH3COOH + NH3
When 25mL of 1M HCl is neutralised by 20mL of NaOH. What is the concentration of the NaOH?
0.8 M
1 M
1.25 M
20ml of 0.1M of acids are used below, which acid require a different volume of 0.1M NaOH to complete neutralization ?
Nitric acid
Sulfuric acid
Acetic acid
Hydrochloric acid
What is mean by equivalence point?
a point which complete neutralisation occur where indicator change colour
a point which complete neutralisation occur where volume of H+ is equal to volume of OH-
a point where pH is equal to pKa
1) 0.04 M NaOH is loaded into a burette - initial reading is 4.50 mL
2) 60.0 mL of unknown monoprotic acid, HA, is added to the Erlenmeyer flask.
3) 2 drops of phenolphthalein is added to the acid.
4) The base is slowly added to the acid until it turns pink. - final reading from the burette is 34.60 mL.
WHAT IS THE MOLARITY OF THE ACID?
0.04 M
0.0012 M
0.02 M
30.1 M
Which of the following salts is the most soluble?
AgCl, Ksp = 1.8x10-10
AgBr, Ksp = 5.3x10-13
AgI, Ksp = 8.3x10-17
CuBr, Ksp = 5.3x10-9
What is the molar solubility of PbS? Ksp = 3.0x10-28
9.0x10-56
3.0x10-28
1.5x10-28
1.7x10-14
Which of the following solutions will decrease the solubility of a saturated solution of Ag3PO4? Select all that apply.
HBr
AgNO3
KOH
K3PO4
The correct mathematical expression for finding the molar solubility (X) of Sn(OH)2 is:
2(X)3 = Ksp
108(X)5 = Ksp
4(X)3 = Ksp
8(X)3 = Ksp
What is the equilibrium expression for the solubility product (Ksp) of the following salt :
MgCO3
Ksp = [Mg2+] [CO3-]
Ksp = [Mg2+] [CO32-]
Ksp = [Mg2+]2 [CO32-]
Ksp = [Mg2+] [CO32-]2
