# Chemistry

What is the molar solubility of Mg(OH)2 in a solution containing 0,10 M NH3 ?

Ksp Mg(OH)2 = 1.2x10^-11
Kp NH3 = 1.8x10^-5

1. 👍 0
2. 👎 0
3. 👁 248
1. ......Mg(OH)2 ==> Mg^2+ + 2OH^-
I......solid.......0.......0
C......solid.......x.......2x
E......solid.......x.......2x

Then NH3 + HOH ==> NH4^+ + OH^-
I....0.1...........0........0
C....-x............x........x
E....0.1-x.........x........x

First, determine the OH^- from the NH3 equation.
Then Ksp = (Mg^2+)(OH^-)
You know Ksp.
(Mg^2+) = x = solubility
(OH^-) = 2x from the Mg(OH)2 dissolution and OH^- from the NH3 for a total of 2x+OH^- from NH3.
Solve for x = Mg^2+ = solubility

1. 👍 0
2. 👎 1

## Similar Questions

1. ### Chemistry

In the qualitative analysis scheme, magnesium and nickel precipitate from solution upon the addition of sodium hydroxide. Once separated from the remaining cations by filtration or decanting, the solid mixture is acidified and

asked by Ashley on November 17, 2016
2. ### Chemistry

Which of the following compounds has the greatest molar solubility? A) AgBr, Ksp= 5.4 x 10^13 B) Ba3(PO4)2, Ksp = 3.0 x 10^-23 C) Al(OH)3, Ksp = 1.9 x 10^-33 D) MgF2, Ksp = 7.4 x 10^-11 E) Pb(OH)2, Ksp = 1.2 x 10^-15 I know the

asked by Anon on May 6, 2018
3. ### chemistry

Calulate the molar solubility of Al(OH)3 in water. (Ksp = 3 x 10^-34) Al(OH)3(s) ==>Al^+3 + 3OH^- Ksp = (Al^+3)(OH^-)^3 = 3E-34 Let x = molar solubility of Al(OH)3 then x molar = (Al^+3) and 3x molar = (OH^-) Plug in to Ksp and

asked by caity on May 2, 2007
4. ### chemistry

Calculate the molar solubility of Cu(OH)2, Ksp = 2.2 × 10–20, in 0.91 M NH3. Don't forget to use the complexation reaction Cu2+ + 4 NH3 ⇌ Cu(NH3)42+, K = 5.0 × 1013. Round your answer to two significant figures and do NOT

asked by Debbie on March 31, 2012
5. ### Chemistry

What is the molar solubility of Mg(OH)2 in a solução containing 0,10 M NH3 ? Ksp Mg(OH)2 = 1.2x10^-11 Kp NH3 = 1.8x10^-5

asked by Kevin on April 18, 2016
6. ### Chemistry-Dr.Bob222

Consider the compounds with the generic formula listed and their corresponding molar solubilities in pure water. Which compound has the smallest value of Ksp? a. AC; molar solubility = 1.35 x 10^-4 M b. AX2; molar solubility =

asked by Nevaeh on April 27, 2016
7. ### Chemistry

Tooth enamel is made up of hydroxyapatite, Ca_10(PO_4)_6(OH)_2 or the empirical formula, Ca_5(PO_4)_3(OH). Use the empirical formula for all calculations because stoichiometry plays two significant roles. A. Print the balanced

asked by John on April 7, 2011
8. ### Chem

(a) The molar solubility of Ag2CrO4(s) at 35°C is 1.3 10-4 mol/L. Calculate Ksp. (b) If 0.0490 g of AgIO3 dissolves per liter of solution, calculate the solubility-product constant. (c) Using the appropriate Ksp value from

asked by Rebekah on April 27, 2011
9. ### Chemistry

What is the solubility of silver chloride in water at 25C? (Ksp = 1.6 x 10^-10) I don't know how to do the work AgCl(s) ==> Ag^+ + Cl^- Let x = molar solutility of AgCl. Then x = molar concentration of Ag^+. and x = molar

asked by Chem girl on May 6, 2007
10. ### chemistry

Copper(I) ions in aqueous solution react with NH3(aq) according to Cu+(aq) + 2NH3(aq) -->Cu(NH3)2^+ Kf = 6.3x10^10 Calculate the solubility (in g·L–1) of CuBr(s) (Ksp = 6.3× 10–9) in 0.41 M NH3(aq).

asked by Katie on February 13, 2012

More Similar Questions