All flashcards
Flashcard 1: How does Ksp change with temperature for exothermic reactions?
Answer: Ksp decreases with temperature. Lower temperature favors exothermic dissolution process.
Flashcard 2: Determine Ksp for Ag2S if [Ag+]=2x and [S2−]=x at equilibrium.
Answer: Ksp=4x3. Substitute equilibrium concentrations: (2x)2(x)=4x3.
Flashcard 3: How does Ksp change with temperature for exothermic reactions?
Answer: Ksp decreases with temperature. Lower temperature favors exothermic dissolution process.
Flashcard 4: What is the relationship between Ksp and Qsp?
Answer: Precipitation occurs if Qsp>Ksp. Qsp compares current ion concentrations to equilibrium values.
Flashcard 5: What does a large Ksp value indicate about solubility?
Answer: Compound is more soluble. Higher Ksp means more ions can dissolve at equilibrium.
Flashcard 6: What is the effect of adding NH3 to AgCl solubility?
Answer: Increases due to complexation. NH3 forms [Ag(NH3)2]+ complex, removing Ag+ ions.
Flashcard 7: What is the effect of pH on the solubility of Mg(OH)2?
Answer: Solubility decreases at higher pH. Higher pH increases [OH−], shifting equilibrium toward solid.
Flashcard 8: Identify the Ksp expression for Ca3(PO4)2.
Answer: Ksp=[Ca2+]3[PO43−]2. Stoichiometry: 3 Ca2+ and 2 PO43− per formula unit.
Flashcard 9: How does the presence of a common ion affect solubility?
Answer: Decreases solubility. Le Chatelier's principle: excess ion shifts equilibrium toward solid.
Flashcard 10: What is the Ksp expression for Al(OH)3?
Answer: Ksp=[Al3+][OH−]3. Aluminum hydroxide: 1 Al3+ and 3 OH− ions.
Flashcard 11: Identify the Ksp expression for BaSO4.
Answer: Ksp=[Ba2+][SO42−]. 1:1 stoichiometry gives simple product of ion concentrations.
Flashcard 12: What is the solubility product constant (Ksp) expression for AgCl?
Answer: Ksp=[Ag+][Cl−]. Product of ion concentrations at equilibrium for the saturated solution.
Flashcard 13: Identify the Ksp expression for CuS.
Answer: Ksp=[Cu2+][S2−]. 1:1 stoichiometry for copper(II) sulfide dissolution.
Flashcard 14: How does complex ion formation affect solubility?
Answer: Increases solubility. Complex formation removes free metal ions from solution.
Flashcard 15: Identify the Ksp expression for PbSO4.
Answer: Ksp=[Pb2+][SO42−]. 1:1 stoichiometry for lead(II) sulfate dissolution.
Flashcard 16: Which has higher solubility: BaSO4 or SrSO4?
Answer: SrSO4 (higher Ksp value). Compare Ksp values; larger value indicates higher solubility.
Flashcard 17: Which compound will precipitate first: AgCl or AgBr?
Answer: AgBr (lower Ksp value). Lower Ksp means less soluble, so precipitates first.
Flashcard 18: State the formula to calculate Qsp.
Answer: Qsp=[cation]m[anion]n. Same form as Ksp but uses current concentrations, not equilibrium.
Flashcard 19: What is the Ksp expression for Fe(OH)3?
Answer: Ksp=[Fe3+][OH−]3. Stoichiometry: 1 Fe3+ and 3 OH− ions per formula unit.
Flashcard 20: Identify the Ksp expression for Hg2Cl2.
Answer: Ksp=[Hg22+][Cl−]2. Dimeric mercury(I) ion has +2 charge with two chlorides.
Flashcard 21: Identify the effect of temperature on Ksp for endothermic dissolution.
Answer: Ksp increases with temperature. Higher temperature favors endothermic dissolution process.
Flashcard 22: How does pH affect solubility of compounds containing basic anions?
Answer: Increases solubility at lower pH. Acidic conditions protonate basic anions, reducing their concentration.
Flashcard 23: Which compound is more soluble: CaF2 or SrF2?
Answer: SrF2 (higher Ksp value). Compare Ksp values directly for same formula type.
Flashcard 24: What is Ksp for PbCl2 given solubility s?
Answer: Ksp=4s3. For PbCl2: Ksp=s(2s)2=4s3.
Flashcard 25: Identify the common ion effect in solubility equilibria.
Answer: Reduction in solubility due to a common ion. Adding an ion already present shifts equilibrium toward solid formation.
Flashcard 26: Calculate Ksp for Ag2S with [Ag+]=2x and [S2−]=x.
Answer: Ksp=4x3. For Ag2S: Ksp=[Ag+]2[S2−]=(2x)2(x)=4x3.
Flashcard 27: Identify the Ksp expression for CdS.
Answer: Ksp=[Cd2+][S2−]. 1:1 stoichiometry for cadmium sulfide dissolution.
Flashcard 28: Determine Ksp for Ag2S if [Ag+]=2x and [S2−]=x at equilibrium.
Answer: Ksp=4x3. Substitute equilibrium concentrations: (2x)2(x)=4x3.
Flashcard 29: Identify the Ksp expression for CdS.
Answer: Ksp=[Cd2+][S2−]. 1:1 stoichiometry for cadmium sulfide dissolution.
Flashcard 30: What is the unit of Ksp for CaF2?
Answer: mol^3/L^3. Units from [Ca2+][F−]2 concentration terms.