Whether Co 2 + can be separated from Zn 2 + or not should be determined. Concept introduction: Solubility product in acid is equilibrium constant for reaction that occurs in acid solution when an ionic compound is dissolved to produce ions. It is represented by K spa . Consider MS an ionic compound dissolved in acidic solution. Its dissociation occurs as: MS ( s ) + 2H 3 O + ( a q ) ⇌ M 2 + ( a q ) + H 2 S ( a q ) + 2H 2 O ( l ) The expression for its K spa is as follows: K spa = [ M 2 + ] [ H 2 S ] [ H 3 O + ] A precipitate of an ionic compound will form when solutions that contain respective ions are mixed. The precipitation depends on value of reaction quotient Q c . Q c is defined in same way as K spa . Also, concentrations in the expression for Q c are concentration at time t and not equilibrium concentrations. Consider MS to be an ionic compound. Its dissociation occurs as: MS ( s ) + 2H 3 O + ( a q ) ⇌ M 2 + ( a q ) + H 2 S ( a q ) + 2H 2 O ( l ) The expression for Q c is as follows: Q c = [ M 2 + ] [ H 2 S ] [ H 3 O + ] Metal cations can be separated into two groups by the precipitation of metal sulfide. The cations which form very insoluble sulfides can be separated from cations which form soluble sulfides. The separation takes place in an acidic solution and use solubility equilibrium. The separation depends on the H 3 O + concentration so that reaction quotient Q c exceeds K spa for insoluble sulfides but not for soluble sulfide. As a result, insoluble sulfides precipitate under acidic condition but soluble sulfides remain in solution.
Whether Co 2 + can be separated from Zn 2 + or not should be determined. Concept introduction: Solubility product in acid is equilibrium constant for reaction that occurs in acid solution when an ionic compound is dissolved to produce ions. It is represented by K spa . Consider MS an ionic compound dissolved in acidic solution. Its dissociation occurs as: MS ( s ) + 2H 3 O + ( a q ) ⇌ M 2 + ( a q ) + H 2 S ( a q ) + 2H 2 O ( l ) The expression for its K spa is as follows: K spa = [ M 2 + ] [ H 2 S ] [ H 3 O + ] A precipitate of an ionic compound will form when solutions that contain respective ions are mixed. The precipitation depends on value of reaction quotient Q c . Q c is defined in same way as K spa . Also, concentrations in the expression for Q c are concentration at time t and not equilibrium concentrations. Consider MS to be an ionic compound. Its dissociation occurs as: MS ( s ) + 2H 3 O + ( a q ) ⇌ M 2 + ( a q ) + H 2 S ( a q ) + 2H 2 O ( l ) The expression for Q c is as follows: Q c = [ M 2 + ] [ H 2 S ] [ H 3 O + ] Metal cations can be separated into two groups by the precipitation of metal sulfide. The cations which form very insoluble sulfides can be separated from cations which form soluble sulfides. The separation takes place in an acidic solution and use solubility equilibrium. The separation depends on the H 3 O + concentration so that reaction quotient Q c exceeds K spa for insoluble sulfides but not for soluble sulfide. As a result, insoluble sulfides precipitate under acidic condition but soluble sulfides remain in solution.
Solution Summary: The author explains that Co2+ is an equilibrium constant for reaction that occurs when an ionic compound is dissolved to produce ions.
Whether Co2+ can be separated from Zn2+ or not should be determined.
Concept introduction:
Solubility product in acid is equilibrium constant for reaction that occurs in acid solution when an ionic compound is dissolved to produce ions. It is represented by Kspa. Consider MS an ionic compound dissolved in acidic solution. Its dissociation occurs as:
MS(s)+2H3O+(aq)⇌M2+(aq)+H2S(aq)+2H2O(l)
The expression for its Kspa is as follows:
Kspa=[M2+][H2S][H3O+]
A precipitate of an ionic compound will form when solutions that contain respective ions are mixed. The precipitation depends on value of reaction quotient Qc. Qc is defined in same way as Kspa. Also, concentrations in the expression for Qc are concentration at time t and not equilibrium concentrations. Consider MS to be an ionic compound. Its dissociation occurs as:
MS(s)+2H3O+(aq)⇌M2+(aq)+H2S(aq)+2H2O(l)
The expression for Qc is as follows:
Qc=[M2+][H2S][H3O+]
Metal cations can be separated into two groups by the precipitation of metal sulfide. The cations which form very insoluble sulfides can be separated from cations which form soluble sulfides. The separation takes place in an acidic solution and use solubility equilibrium.
The separation depends on the H3O+ concentration so that reaction quotient Qc exceeds Kspa for insoluble sulfides but not for soluble sulfide. As a result, insoluble sulfides precipitate under acidic condition but soluble sulfides remain in solution.
How do the concentrations of Ag+ and CrO4 2− in a saturated solution above 1.0 g of solid Ag2CrO4 change when 100 g of solid Ag2CrO4 is added to the system? Explain.
What is the pH for a buffer made of 0.214 MNH 3 and 0.107 MNH 4 Cl ? K b for NH 3 is 1.8 * 10 ^ - 5 .
To a solution containing 1.0 × 10 ^(- 2) M AgNO3 and 2.0 × 10 ^(- 2) M Pb (NO3) 2 is added, with stirring, solid NaCl. Assuming that the volume of the solution does not change during the addition of NaCl, how much NaCl must be concentrated to initiate the precipitation of PbCl2 and how much to initiate the precipitation of AgCl? Which of the two salts will precipitate first?
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Author:Steven D. Gammon, Ebbing, Darrell Ebbing, Steven D., Darrell; Gammon, Darrell Ebbing; Steven D. Gammon, Darrell D.; Gammon, Ebbing; Steven D. Gammon; Darrell
Author:Steven D. Gammon, Ebbing, Darrell Ebbing, Steven D., Darrell; Gammon, Darrell Ebbing; Steven D. Gammon, Darrell D.; Gammon, Ebbing; Steven D. Gammon; Darrell