1. Dismiss Notice
  2. Download free Tapatalk for iPhone or Tapatalk for Android for your phone and follow the SDN forums with push notifications.
    Dismiss Notice
Dismiss Notice
Visit Interview Feedback to view and submit interview information.

Question from AAMC #3 - Question 1

Discussion in 'MCAT Study Question Q&A' started by MD2BeWpg, Aug 1, 2011.

  1. MD2BeWpg

    Joined:
    Mar 12, 2011
    Messages:
    40
    Likes Received:
    0
    Status:
    Pre-Medical
    I realize I am not supposed to post actual questions from the test. So I'm not.
    I understand why the right answer is what it is. But can someone please tell me why they say that PbCl2 forms an aqueous solution in the following reaction?
    PbCO3 + 2HCl --> PbCl2 (aq) + CO2 + H2O

    Aren't all the halogens soluble EXCEPT with heavy metals and Ag, Pb and Hg???? Shouldn't PbCl2 be a solid????

    Please Help!
     
  2. Note: SDN Members do not see this ad.

  3. BeatMCAT

    Joined:
    Mar 3, 2011
    Messages:
    58
    Likes Received:
    0
    Yeah that is true to a certain degree but if I remember correctly PbCl2 is still slightly soluble..that's probably the reason. not 100% sure though
     
  4. englishtablet

    Joined:
    Jul 17, 2011
    Messages:
    17
    Likes Received:
    0
    Status:
    Pre-Medical
    Pbcl2 is sparingly soluble in acids and bases. However, it is not soluble in H2O. On larger scale, definitely not as soluble as any nitrate.
     
  5. paul411

    paul411 ANES
    7+ Year Member

    Joined:
    May 27, 2010
    Messages:
    1,617
    Likes Received:
    31
    Status:
    Resident [Any Field]
    IIRC, insoluble is defined as a solubility of less than 3g per 100mL. So feasibly, you can add PbCl2 to a lot of water (let's say 3g in 10L) and that will be an aqueous solution (homeopathic PbCl2 :p). However, I'm not completely sure about this, someone else should verify.
     

Share This Page