chemistry

When an aqueous solution suspected of containing Ba2+ or Pb2+ or both are mixed with sulfuric acid a precipitate forms. in another test, when the original solution is mixed with an aqueous solution of sodium sulfide no precipitate forms. What do these two tests indicate about the likel presence of Ba2+ and Pb2+ in the original solution? Explain your answer.

  1. 👍
  2. 👎
  3. 👁
  1. Ba ions, perhaps.
    Pb ions, no.

    Pb^+2 + H2SO4 ==> PbSO4(s) + 2H^+
    Ba^+2 + H2SO4 ==> BaSO4(s) + 2H^+
    Note: Both BaSO4 and PbSO4 are insoluble in water solution and both are white. This test indicates that either or both could be present (as well as other ions).

    Ba^+2 + Na2S ==> no reaction since BaS is soluble in water.
    Pb^+2 + Na2S ==> PbS(s) + 2Na^+
    PbS is black and is insoluble in water solution.
    Since there was no ppt with this reagent, Pb is definitely absent. Ba^+2 may still be present but there is no definite proof of that.

    1. 👍
    2. 👎

Respond to this Question

First Name

Your Response

Similar Questions

  1. Chemistry

    A solution containing a mixture of metal cations was treated with dilute HCl and no precipitate formed. Next, H2S was bubbled through the acidic solution. A precipitate formed and was filtered off. Then, the pH was raised to about

  2. Chemistry

    Suppose a saturated solution of barium fluoride contains 1.5 x 10 ^ -2 M of F-. What is the Ksp of BaF2. I know that the balanced equation of this reaction is: BaF2 (s) --> Ba2+ (aq) + 2F- (aq) There is a 1:1 ratio between BaF2

  3. chemistry

    write a balanced equation for the reaction that occurs when an aqueous solution of iron(II) chloride is mixed with an aqueous solution o potassium hydroxide.

  4. Chemistry

    When an aqueous solution of lithium chloride is mixed with an aqueous solution of ammonium sulfate a precipitate forms a new salt is formed a gas is evolved an acid and base are formed no reaction occurs I either thought it was a

  1. cHEMISTRY

    The reaction of aqueous iron(II) sulfate and aqueous barium nitrate is represented by the balanced net ionic equation. SO42-(aq) + Ba2+(aq) → BaSO4(s) Give the balanced formula equation for the reaction. Include the states.

  2. Chemistry

    A volume of 70.0mL of aqueous potassium hydroxide(KOH) was titrated against a standard solution of sulfuric acid (H2SO4). What was the molarity of the solution if 19.2mL of 1.50M H2SO4 was needed? The equation is

  3. chemistry

    If 15.0 mL of a 1.5M HCl solution at 22.5 degrees C is mixed with 25.0mL of a 1.5M NaOH solution at 21.5 degrees C that is in a calorimeter, and the final mixed solution temperature ends up at 28.5 degrees C, 1.)what is the

  4. chemistry

    An aqueous solution of barium nitrate and an aqueous solution of sodium sulfate are mixed together. Write the skeletal equation for the following reaction: Balance the completed chemical equation in .

  1. Chemistry

    You are given a solution that contains one of the ions Ag+, Pb2+ or Ba2+. Develop a procedure to determine which ion is present. More than one reaction may be required to discover the ion’s identity. Explain how your procedure

  2. Chemistry

    What is the Pb2+ concentration in a saturated solution of PbCl2 if the concentration of chloride ion is 0.023 M? Units: M ksp = 1.72x10^-5 i can't seem to get the answer. i have tried and ICE diagram and going from there: PbCl2

  3. 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

  4. Chemistry

    Which of the following ions can be reduced from an aqueous solution? A)Ba2+ B)Al3+ C)Sn2+ D)Na+ Do I look for the higher volts? Thanks in advance.

You can view more similar questions or ask a new question.