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Homework Help: Conversion of compounds

  1. Apr 17, 2005 #1
    I'm having a lot of trouble with some of these questions. Please help

    Converting manganse nitrate-6-water to manganese sulfate-4-water

    Converting calcium acetate-1-water to calcium nitrate-4-water.

    It's the "water" bits that confuse me. I just need a couple of ionic equations to show the conversion (like dissolving it in water, etc).

    Thank you.
     
  2. jcsd
  3. Apr 17, 2005 #2

    dextercioby

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    Converting,like reacting with certain compounds?

    For example

    [tex] Mn\left(NO_{3}\right)_{2}\cdot 6H_{2}O+H_{2}SO_{4}\rightarrow MnSO_{4}+2HNO_{3}+6H_{2}O [/tex]

    How do you know that by recrystalization of the reaction products u'd get [itex]MnSO_{4}\cdot 4H_{2}O [/itex]...?


    Daniel.
     
  4. Apr 17, 2005 #3

    dextercioby

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    As for the second

    [tex] Ca(CH_{3}-COO)_{2}\cdot H_{2}O+2HNO_{3}\rightarrow Ca\left(NO_{3}\right)_{2}+2CH_{3}-COOH [/tex]

    Again,by recrystalization,how do u know it's gonna be a [itex] Ca\left(NO_{3}\right)_{2}\cdot 4H_{2}O [/itex] ?



    Daniel.
     
  5. Apr 18, 2005 #4
    That's exactly what I'm having trouble with. Thanks for your help. :smile:
     
  6. Apr 18, 2005 #5

    dextercioby

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    Well,those acids must be in solution,u can see that,doing the second one stoichiometrically,u won't get that 4 molecules of water.


    Daniel.
     
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