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Questions and Answers
What is the mass in grams of solute in 37.0 mL of 5.75 x 10-4 M benzoic acid?
What is the mass in grams of solute in 37.0 mL of 5.75 x 10-4 M benzoic acid?
- 0.0675 g
- 0.0875 g
- 0.0495 g
- 0.04335 g (correct)
Why is nitric acid not used in the standardization of potassium permanganate?
Why is nitric acid not used in the standardization of potassium permanganate?
- It is not a suitable indicator
- It is a weak acid
- It reacts with potassium permanganate
- It is a strong oxidizing agent (correct)
What is the pH of 0.1 M nitric acid?
What is the pH of 0.1 M nitric acid?
- 1.3
- 1.7
- 1 (correct)
- 2.1
What is the concentration of NaOH after 5ml of 1.5g/ml NaOH is diluted with water to 15ml?
What is the concentration of NaOH after 5ml of 1.5g/ml NaOH is diluted with water to 15ml?
What is the role of oxalic acid in the standardization of potassium permanganate?
What is the role of oxalic acid in the standardization of potassium permanganate?
What is the difference between a solution, suspension, and precipitate?
What is the difference between a solution, suspension, and precipitate?
What is the solubility product constant (Ksp) of a salt?
What is the solubility product constant (Ksp) of a salt?
Copper(I) bromide has a measured molar solubility of 2.20x10-4 mol/L at 25°C. What is its Ksp value?
Copper(I) bromide has a measured molar solubility of 2.20x10-4 mol/L at 25°C. What is its Ksp value?
Will NiCO3 precipitate if a solution is 1.5 x 10–6 M in Ni2+ and 6.0 x 10–4 M in CO32–, given that Ksp(NiCO3) = 6.6 x 10–9?
Will NiCO3 precipitate if a solution is 1.5 x 10–6 M in Ni2+ and 6.0 x 10–4 M in CO32–, given that Ksp(NiCO3) = 6.6 x 10–9?
A solution contains 0.001 M of KI and 0.10 M of KCl. AgNO3 is gradually added to this solution. Which forms first, solid AgI or solid AgCl?
A solution contains 0.001 M of KI and 0.10 M of KCl. AgNO3 is gradually added to this solution. Which forms first, solid AgI or solid AgCl?
The formula of the compound formed by the reaction of lead and phosphate ions is [Pb].[PO4].
The formula of the compound formed by the reaction of lead and phosphate ions is [Pb].[PO4].
The solubility of Zn(OH)2 in mg/L is 0.45 mg/L.
The solubility of Zn(OH)2 in mg/L is 0.45 mg/L.
The solubility product constant (Ksp) of a salt is directly proportional to the solubility of the substance.
The solubility product constant (Ksp) of a salt is directly proportional to the solubility of the substance.
For a salt AaBb, the solubility product constant (Ksp) is equal to [A+]a.[B-]b.
For a salt AaBb, the solubility product constant (Ksp) is equal to [A+]a.[B-]b.
Oxalic acid is used as a primary standard in the standardization of potassium permanganate.
Oxalic acid is used as a primary standard in the standardization of potassium permanganate.
The pOH of ammonium chloride (0.05 M) can be calculated using the formula pOH = -log[OH-].
The pOH of ammonium chloride (0.05 M) can be calculated using the formula pOH = -log[OH-].
The reaction quotient Q is always equal to the solubility product constant (Ksp) at equilibrium.
The reaction quotient Q is always equal to the solubility product constant (Ksp) at equilibrium.
If the reaction quotient Q is greater than the solubility product constant (Ksp), a precipitate will always form.
If the reaction quotient Q is greater than the solubility product constant (Ksp), a precipitate will always form.
The final concentration of NaOH after dilution is 0.5 g/ml.
The final concentration of NaOH after dilution is 0.5 g/ml.
For a solution containing 0.001 M of KI and 0.10 M of KCl, AgI will form first when AgNO3 is gradually added.
For a solution containing 0.001 M of KI and 0.10 M of KCl, AgI will form first when AgNO3 is gradually added.
Study Notes
Solution, Suspension, and Precipitate
- Solution: a homogeneous mixture where one substance is dissolved in another
- Suspension: a heterogeneous mixture where one substance is dispersed in another
- Precipitate: a solid that forms from a solution when the concentration of ions exceeds the solubility product
Solubility Product Constant (Ksp)
- Ksp: the product of the concentration of ions present in a saturated solution of an ionic compound
- For a salt AaBb: Ksp = [A+]a.[B-]b
- Ksp represents the level at which a solute dissolves in a solution
- Higher Ksp value indicates higher solubility
Examples of Ksp Calculations
- For AgCl: Ksp = [Ag+].[Cl-]
- For Pb3(PO4)2: Ksp = [Pb2+]3.[PO43-]2
- For CuBr: Ksp = [Cu+].[Br-] = 4.0x10-8 mol2/L2
- For Bi2S3: Ksp = [2X]2.[3X]3 = 1.1 x 10-73
Precipitation Reaction
- NiCO3: will not precipitate if Q < Ksp
- Reaction quotient Q = [Ni2+][CO32-]
- NiCO3 → Ni2+ + CO32-
Comparison of Ksp Values
- AgCl: Ksp = 1.6×10−10
- AgI: Ksp = 1.5×10−16
- AgI will form first in a solution with KI and KCl
Standardization of Potassium Permanganate
- Procedure: titrate oxalic acid or iron solution with potassium permanganate to the faint pink color end-point
- Standardization equation: (MV)oxalic = (MV)KMnO4 or (MV)Iron = (MV)KMnO4
Solution, Suspension, and Precipitate
- Solution: a homogeneous mixture where one substance is dissolved in another
- Suspension: a heterogeneous mixture where one substance is dispersed in another
- Precipitate: a solid that forms from a solution when the concentration of ions exceeds the solubility product
Solubility Product Constant (Ksp)
- Ksp: the product of the concentration of ions present in a saturated solution of an ionic compound
- For a salt AaBb: Ksp = [A+]a.[B-]b
- Ksp represents the level at which a solute dissolves in a solution
- Higher Ksp value indicates higher solubility
Examples of Ksp Calculations
- For AgCl: Ksp = [Ag+].[Cl-]
- For Pb3(PO4)2: Ksp = [Pb2+]3.[PO43-]2
- For CuBr: Ksp = [Cu+].[Br-] = 4.0x10-8 mol2/L2
- For Bi2S3: Ksp = [2X]2.[3X]3 = 1.1 x 10-73
Precipitation Reaction
- NiCO3: will not precipitate if Q < Ksp
- Reaction quotient Q = [Ni2+][CO32-]
- NiCO3 → Ni2+ + CO32-
Comparison of Ksp Values
- AgCl: Ksp = 1.6×10−10
- AgI: Ksp = 1.5×10−16
- AgI will form first in a solution with KI and KCl
Standardization of Potassium Permanganate
- Procedure: titrate oxalic acid or iron solution with potassium permanganate to the faint pink color end-point
- Standardization equation: (MV)oxalic = (MV)KMnO4 or (MV)Iron = (MV)KMnO4
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Description
Learn about the differences between solution, suspension, and precipitate. Understand the concept of solubility product constant (Ksp) and its calculation for ionic compounds.
