posted by .

What did you observe after the addition of dilute HCl to the saturated lead chloride solution? Explain observations using relevant chemical reaction.

I observed that a white precipitate was formed.

Not sure how to explain why it formed

  • Chemistry -

    You had a saturated solution of PbCl2 which means that (Pb^+)(Cl^-)^2 was just equal to Ksp.
    When you added dilute HCl, you increased the (Cl^-) [the common ion effect] and this DECREASED the solubility of PbCl2; therefore, some of the PbCl2 pptd and that's what you saw.
    PbCl2 ==> Pb^2+ + 2Cl^-

    (Pb^2+)(Cl^-)2 = Ksp.
    So note that if (Cl^-) is added to the above equation, the Cl^- is increased, Le Chatelier's principle tells you that will force the equilibrium to the left and that DECREASES solubility which means some of the PbCl2 from the saturated solution must come out of solution. You observed that as a ppt.

  • Chemistry -

    Thank you!

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. Chemistry

    A colourless solution contains one type of ion. When one adds dilute HCl to it, a white precipitate initially forms. However, once more of the HCl solution is added, the precipitate dissolves. Explain why the ion is Pb2+ and not Al3+, …
  2. Chemistry-Experiment

    I did an experiment where I had 5 ml of MgCl2, then 5 ml NH4 solution (NH4OH (aq)) was added and it was observed that a precipitate formed; cloudy solution. After I added 1g of NH4Cl(s), the solution clears up (transparent). 2nd experiment: …
  3. Chemistry - Solubility Product

    What did you observe after the addition of dilute HCl to the saturated lead chloride solution?
  4. Chemistry - Solubility

    1.a) What did you observe upon the addition of NH3 (aq) to the magnesium chloride solution?
  5. Chem Help!

    Assume that a given solution caontains Ag+or Ba2+ or a mixture of both. A reasonable method for doing a qualitative analysis on this solution might be sketched out as followes (remember || means a precipitate forms and | means a solution …
  6. Chemistry

    A student was given a solid containing a mixture of nitrate salts. The sample completely dissolved in water, and upon addition of dilute HCl, no precipitate formed. The pH was lowered to about 1 and H2S was bubbled through the solution. …
  7. Organic chemistry (QA)

    In which solutions will a white precipitate be observed when aqueous copper (ii) chloride is added to it?
  8. Qualitative analysis ( Chemistry)

    A solution x forms a white precipitate with dilute sulfur in acid and also with aqueous silver nitrate. What could solution x contain?
  9. Qualitative analysis

    X is a solution containing both sodium chloride and sodium sulfate. Three of the following solutions will produce a white precipitate on addition of X. Which one remains clear?
  10. Chemistry La

    An unknown solution may contain some of the cations listed below. One student preformed a series of experiments to determine what ions are in the solution. Based upon the experiments performed by the students, the results are as follows: …

More Similar Questions