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Thread: [HELP] Problems about crystallization salt

  1. #1 [HELP] Problems about crystallization salt 
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    Regarding to the subject...

    During the crystallization process, will all the salt be crystallized out? Why?

    Another question...

    Copper(II) nitrate can be prepared by adding nitric acid to copper(II) oxide.
    Is that true? Why?

    Last one,

    Why is the salt solution not evaporated to dryness?

    Hope somebody can help me out.


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  3. #2  
    Forum Bachelors Degree Demen Tolden's Avatar
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    Not that I know all that much about chemistry, but let me take a guess to part of your second question.

    Copper(II) nitrate


    Nitric acid


    Copper(II) oxide


    So for the equation we have:
    -->

    Balancing this out we have:
    -->

    In word format:
    Nitric acid + Copper(II) oxide --> Copper(II) nitrate + Hydrogen + Oxygen

    That 2H and O look suspicious. Perhaps they join to make water? I also don't think I know enough to come up with the process that does this.


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  4. #3  
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    Quote Originally Posted by Demen Tolden
    Not that I know all that much about chemistry, but let me take a guess to part of your second question.

    Copper(II) nitrate


    Nitric acid


    Copper(II) oxide


    So for the equation we have:
    -->

    Balancing this out we have:
    -->

    In word format:
    Nitric acid + Copper(II) oxide --> Copper(II) nitrate + Hydrogen + Oxygen

    That 2H and O look suspicious. Perhaps they join to make water? I also don't think I know enough to come up with the process that does this.
    Thx for answering the question :-D
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  5. #4  
    Forum Sophomore oceanwave's Avatar
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    im rather certain that metal oxides react with metals to form the metal salt PLUS water (H2O) so yea, they do not really form hydrogen gas and oxygen gas.
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