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Homework Help: Started stochiometry in school

  1. May 18, 2008 #1
    hello guys, this is my first topic here

    we jut started stochiometry in school and did a lab

    we used 12.5g of copper sulfate pentahydrate and mixed it in water

    and then we added fe (ii) and slowly heated it

    then i decanted the extra water and measured the total mass

    it was 2.57g total

    i was asked to answer these ollowing questions
    someomeof them i know but i don know the balanced equation or percent yiled calculations

    1.what is the type of rxn that tok place? double replacement?

    2. write the word equation and the BALANced formmula equation for thisreaction. inculde states of matter
    its cuso4 + fe = cu + feso4 + 5h2o right? i do not think its balanced though

    3.what is the name and formula of the solid product? i do not get what this question is asking me

    lol i dont know neof these

    i got this too

    4.start by using the mass of iron powder and complete the folowing: i can get these if i get the right balanced equation
    a.what is the mole ration for this reaction?
    b.calculate the amount of moles of product
    c.calc the theoretical yeild in grams of the product

    5.what is the actual yield of the product?

    6.calc the percent yiled of the product

    7.based on your calc percent yiled, describe two source of error from your experiment

    any help would be appreciated

    thing is due tommorow >.< i cqan answer some of these if i know the anwsers to others

    thanks, ruth
    Last edited: May 18, 2008
  2. jcsd
  3. May 18, 2008 #2
    CuSO4*5H2O(aq) + Fe(s) = Cu(s) + FeSO4(aq) + 5 H2O(g)

    is that the right eq balanced if fe2+ was used?
  4. May 18, 2008 #3
    /i figured out answers to most with the bequation but can u guys tell me if the eq is right
  5. May 18, 2008 #4
    displacement reaction occurs. (Fe is more reactive than Cu)

    you can omit the water of crystallisation. when you dissolve solid CuSO4 solid you get Cu2+ and SO42- ions. the water of crystallisation does not take part in the reaction.

    CuSO4 + Fe -----> FeSO4 + Cu
  6. May 18, 2008 #5
    the reactants are copper(11) sulphate and Iron. What are the products?
  7. May 18, 2008 #6
    when u mean displacement...single replacement right?
    we didnt learn displacement maybe what ur saying is the smething
  8. May 18, 2008 #7


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    Staff: Mentor

    Go net ionic. SO4-2 is only a spectator.
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