Whether Fe 2 + can be separated from Sn 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 Fe 2 + can be separated from Sn 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 Fe2+ is an equilibrium constant for reaction that occurs when an ionic compound is dissolved to produce ions.
Whether Fe2+ can be separated from Sn2+ 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.
Calculate the pH of a buffer solution that contains 0.25 M benzoic acid
(C,H5CO2H) and 0.15M sodium benzoate (C6H,COONA). [K, = 6.5 x 10 5 for
benzoic acid]
O 4.83
O 3.40
O 4.41
O 4.19
O 3.97
True or False: NaBr can never be the salt of a buffer.
http://www.sciencegeek.net/tables/ka.shtml
O True
O False
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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