Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

gedtajia

  • 3 years ago

gen chem 1: A sample of PbCO3 , XPb(OH)2 was heated with excess sulfuric acid, yielding PbSO4, H2O, and CO2. If 2.280g of PbSO4 and 0.1104g of CO2 were obtained, what is the value of X?

  • This Question is Closed
  1. gedtajia
    • 3 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    So, PbCO3 XPb(OH)2 + H2SO4 ---> PbSO4 + H2O unbalanced

  2. gedtajia
    • 3 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    oops i meant PbCO3 XPb(OH)2 + H2SO4 ---> PbSO4 + H2O + CO2 unbalanced

  3. gedtajia
    • 3 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    I traced CO2 to PbCO3, one mole of PbCO3 = one mole of CO2.

  4. gedtajia
    • 3 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    I saw a yahoo answer that said the next solution is to trace PbSO4 to XPb(OH)2, I wonder how that's possible since there are two sources of Pb

  5. thushananth01
    • 3 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    did u get the answer?

  6. gedtajia
    • 3 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    no =/

  7. aaronq
    • 3 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    so you find the moles of PbSO4 and CO2, their ratio is 3:1 use the equation: PbCO3 XPb(OH)2 + H2SO4 ---> PbSO4 + H2O + CO2 3 1 notice that the only source of SO4 is H2SO4, so: PbCO3 XPb(OH)2 + H2SO4 ---> PbSO4 + H2O + CO2 3 3 1 only source of C from CO3 is C from CO2, PbCO3 XPb(OH)2 + H2SO4 ---> PbSO4 + H2O + CO2 1 3 3 1 the result from 3 moles of Pb produced, 3: so , PbCO3 XPb(OH)2 + H2SO4 ---> PbSO4 + H2O + CO2 1 2 3 3 1 now just add up the oxygens

  8. gedtajia
    • 3 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    thanks

  9. aaronq
    • 3 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    no prob

  10. Not the answer you are looking for?
    Search for more explanations.

    • Attachments:

Ask your own question

Sign Up
Find more explanations on OpenStudy
Privacy Policy