Calculate the molar solubility of Fe(OH)2 in pure water

Chemistry by OpenStax (2015-05-04)
1st Edition
ISBN:9781938168390
Author:Klaus Theopold, Richard H Langley, Paul Flowers, William R. Robinson, Mark Blaser
Publisher:Klaus Theopold, Richard H Langley, Paul Flowers, William R. Robinson, Mark Blaser
Chapter15: Equilibria Of Other Reaction Classes
Section: Chapter Questions
Problem 101E: Calculate the molar solubility of CdCO3 in a buffer solution containing 0.115 M Na2CO3 and 0.120 M...
icon
Related questions
icon
Concept explainers
Question

Calculate the molar solubility of Fe(OH)2 in pure water

Expert Solution
Step 1

The molar solubility has a direct relation with the solubility product. The solubility product of a substance is the number of moles of solute dissolved in per liter volume of the solution until the solution gets saturated ( means the maximum amount of solute is dissolved). Its unit of measurement is mol/l or M (molarity). For example,

AaBb (s)aA+ (aq)+ bB- (aq)Ksp= [A+]a[B-]b where,Ksp is solubility product constantA+ is cation in aqueous solutionB- is anion in aqueous solutiona and b are relative concentrations of A and B

 

Step 2

The reaction of solubility of Fe(OH)2 in pure water is as-

Fe(OH)2 (s)  Fe2+(aq)+ 2 OH- (aq)

Assume x be the molar solubility of Fe(OH)which gives x mol/l of Fe2+ and 2x mol/l of OH-.

The Ksp value of Fe(OH)is 4.87×10-17

Now, writing the solubility product relation with molar solubility for the above equation is as-

Ksp= [Fe2+][OH-]2 4.87×10-17=x.(2x)2 4.87×10-17=4x3x=4.87×10-1734=2.30×10-6 M

 

steps

Step by step

Solved in 3 steps

Blurred answer
Knowledge Booster
Ionic Equilibrium
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, chemistry and related others by exploring similar questions and additional content below.
Similar questions
Recommended textbooks for you
Chemistry by OpenStax (2015-05-04)
Chemistry by OpenStax (2015-05-04)
Chemistry
ISBN:
9781938168390
Author:
Klaus Theopold, Richard H Langley, Paul Flowers, William R. Robinson, Mark Blaser
Publisher:
OpenStax
Chemistry for Engineering Students
Chemistry for Engineering Students
Chemistry
ISBN:
9781337398909
Author:
Lawrence S. Brown, Tom Holme
Publisher:
Cengage Learning
Chemistry: Principles and Reactions
Chemistry: Principles and Reactions
Chemistry
ISBN:
9781305079373
Author:
William L. Masterton, Cecile N. Hurley
Publisher:
Cengage Learning
Chemistry: Matter and Change
Chemistry: Matter and Change
Chemistry
ISBN:
9780078746376
Author:
Dinah Zike, Laurel Dingrando, Nicholas Hainen, Cheryl Wistrom
Publisher:
Glencoe/McGraw-Hill School Pub Co
General Chemistry - Standalone book (MindTap Cour…
General Chemistry - Standalone book (MindTap Cour…
Chemistry
ISBN:
9781305580343
Author:
Steven D. Gammon, Ebbing, Darrell Ebbing, Steven D., Darrell; Gammon, Darrell Ebbing; Steven D. Gammon, Darrell D.; Gammon, Ebbing; Steven D. Gammon; Darrell
Publisher:
Cengage Learning
Chemistry & Chemical Reactivity
Chemistry & Chemical Reactivity
Chemistry
ISBN:
9781337399074
Author:
John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
Publisher:
Cengage Learning