Chemistry

posted by .

A saturated solution of Mg(OH)2 is prepared having a large excess of Mg(OH)2. Sn(NO3)2 is added to the solution. Ksp = 1.8 10-11 for Mg(OH)2 and Ksp = 5.1 10-26 for Sn(OH)2.
(a) What [Sn2+] is required to start the precipitation of Sn(OH)2?
(b) What [Sn2+] is required so that the [Mg2+] in solution will be 0.14 M?

  • Chemistry -

    First determine the OH^- already in the solution from Mg(OH)2.
    .......Mg(OH)2 ==> Mg2+ + 2OH^-
    I.......solid.......0......0
    C.......solid.......x......2x
    E.......solid.......x......2x

    Ksp = (Mg^2+)(OH^-)^2
    Solve for x = Mg and OH = 2x.

    Then go through the Sn(OH)2 the same way, subtitute OH from the Mg(OH)2 calculation and solve for (Sn^2+).

    b. Go back to Mg(OH)2, substitute 0.14M for (Mg^2+) and solve for OH^-. Substitute that OH^- into the Sn(OH)2 and solve for (Sn^2+)

  • Chemistry -

    Thank you! I got this one right.

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. chemistry

    OKOK I know that I have posted this question but I just don't understand the last part. 50.0 ml of a 0.0500 M solution of lead (II) nitrate is mixed with 40.0 ml of a 0.200 M solution of sodium iodate at 25°C. Calculate the Pb2+ and …
  2. chemistry check 2

    I know you've read this question too many times already but I just want to make sure I did the last part (Ksp) correctly. 50.0 ml of a 0.0500 M solution of lead (II) nitrate is mixed with 40.0 ml of a 0.200 M solution of sodium iodate …
  3. Chemistry

    1x10-2 mol of MgSO4 (Ksp = 9) is added to 1 L of water. Will 1x10-5 mol of CaSO4 (Ksp = 10-6) completely dissolve in the solution?
  4. Chemistry

    Hi, I have a few chemistry problems that I'm having trouble solving. I put my attempted solutions after the problems in *'s. There was one problem I had no idea how to solve. What concentration of silver chromate (Ksp = 9.0 x 10-12) …
  5. Chemistry (urgent)

    Hi, I have a few chemistry problems that I'm having trouble solving. I put my attempted solutions after the problems in *'s. There was one problem I had no idea how to solve. What concentration of silver chromate (Ksp = 9.0 x 10-12) …
  6. CHEMISTRY--PLEASE HELP, URGENT

    A saturated solution of CaSO4(aq) is made in a beaker until there is excess calcium sulfate resting at the bottom. Then solid potassium sulfate is added. Which of the following is true?
  7. chemistry

    A saturated solution of Mg(OH)2 is prepared having a large excess of Mg(OH)2. Sn(NO3)2 is added to the solution. Ksp = 1.9 10-11 for Mg(OH)2 and Ksp = 6.0 10-26 for Sn(OH)2.
  8. Chemistry

    A saturated solution of Mg(OH)2 is prepared having a large excess of Mg(OH)2. Sn(NO3)2 is added to the solution. Ksp = 1.9 x 10^-11 for Mg(OH)2 and Ksp = 6.0x10^-26 for Sn(OH)2. What [Sn2+] is required so that the [Mg2+] in solution …
  9. chemistry

    Given a saturated solution of CaF2, write the ionic equilibrium and use it to calculate the solubility of CaF2. My answers for the ionic equation and ksp values are CaF2(s)<->Ca2+(aq)+ 2F-(aq) Ksp= [Ca2+][F-]2 ksp=2.02*10^-4 …
  10. chemistry

    A solution prepared by mixing 16.7 mL of 0.760 M NaCl and 16.7 mL of 0.760 M KI was titrated with 0.380 M AgNO3 in a cell containing a silver indicator electrode and a saturated calomel reference electrode. (a) What is [Ag+] when 16.2 …

More Similar Questions