Taking into account the dissolution-precipitation equilibrium of Fe(OH)2: Fe(OH)2 (s) ---> Fe2+ (aq) + 2OH- (aq)...
Taking into account the dissolution-precipitation equilibrium of Fe(OH)2:
Fe(OH)2 (s) ---> Fe2+ (aq) + 2OH- (aq)
(a) How much Fe2+ (expressed in mg/dm3) may be
present in a water containing 0.001 M of NaOH without occurring
precipitation of Fe(OH)2 ?
(b) Determine the maximum amount of Fe2+ in
solution (expressed in mg/dm3) by lowering the pH value of water by
two units (possible by the addition of a strong acid).
Kps (Fe(OH)2)= 2.0 x 10^-15 M^3
Homework Answers
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Taking into account the dissolution-precipitation
equilibrium of Fe(OH)2:
Fe(OH)2 (s) ---> Fe2+ (aq) + 2OH- (aq)...
An acidic solution is 0.01 M in Mg2+, Cu2+, and Fe2+. The pH of the solution...
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Let us assume that Fe(OH)3(s) is completely insoluble, which signifies that the precipitation reaction with NaOH(aq)...
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Let us assume that Fe(OH)3 (s) is completely insoluble, which signifies that the precipitation reaction with...
Let us assume that Fe(OH)3 (s) is completely insoluble, which signifies that the precipitation reaction with NaOH(aq) (presented in the transition) would go to completion. Fe3+ (aq) + 3NaOH(aq) + Fe(OH)3(s) + 3Na+ (aq) If you had a 0.350 L solution containing 0.0150 M of Fe3+ (aq), and you wished to add enough 1.26 M NaOH(aq) to precipitate all of the metal, what is the minimum amount of the NaOH(aq) solution you would need to add? Assume that the NaOH(aq)...
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A chemist requires a solution of 2.00 M Fe2+ for an experiment. (The Ksp of Fe(OH)2...
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2. Consider the following equilibrium: Mg(OH)2(8) 5 Mg?'(aq) + 2OH(aq) redict the shift in system at equilibrium if a solution of HCI is added dropwise to the system at equilibrium. Briefly explain. 0. Predict the change in equilibrium if a solution of NaOH is added dropwise to the system at equilibrium. Briefly explain. c. Predict the change in equilibrium if the system at equilibrium is diluted by distilled water. Briefly explain
Let us assume that Fe(OH)3 (s) is completely insoluble, which signifies that the precipitation reaction with NaOH(aq) (presented in the transition) would go to completion. Fe3+ (aq) + 3NaOH(aq) + Fe(OH)3(s) + 3Na+ (aq) If you had a 0.350 L solution containing 0.0150 M of Fe3+ (aq), and you wished to add enough 1.26 M NaOH(aq) to precipitate all of the metal, what is the minimum amount of the NaOH(aq) solution you would need to add? Assume that the NaOH(aq)...
3. Which of the following changes to a saturated solution of Mg(OH)2 will cause the solubility of Mg(OH)2 to increase, dissolving more of the solid? A. Addition of soluble NaOH B. Addition of soluble Mg(NO3)2 C. Addition of Mg(OH)2(5) D. Lowering the pH of the solution E. Increasing the pH of the solution 4. Which of the following best describes the redox reaction occurring in the hydrogen fuel cell? A. H2 + 2OH → 2H2O B. H* + OH-H20 C....
A chemist requires a solution of 2.00 M Fe2+ for an experiment. (The Ksp of Fe(OH)2 is 4.9x10-17) a) Will the precipitation of Fe(OH)2 (s) be an issue if the solution is prepared with pure water at 25°C? b) [1 pt] What might the chemist do to prepare this Fe2+ solution to the desired concentration?
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