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Thread: Questions on HCl and H2SO4 reactions

  1. #1 Questions on HCl and H2SO4 reactions 
    Forum Bachelors Degree The P-manator's Avatar
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    I am learning, on my own, with the help of textbooks kindly given to me at Christmas by my grandfather and my own experimenting, some more advanced chemistry than what I studied in Grade Seven. Partly as preparation for High School, and partly for my own knowledge. However, I ran across some reactions that need clarifying.

    Through frequent observation, I noticed that HCl likes to form chlorides. So is this equation correct?

    CuSO4 + 2HCl --> CuCl2 + H2SO4

    Although I found it unlikely that it would form sulphuric acid, I could not find another spot to put the SO4, which I know cannot exist as a free compound.

    The second puzzlement in my going-ons was that sulphuric acid usually reacts with metal carbonates to form sulphates, am I not correct? For example, they usually ended up something like this, right:

    H2SO4 + CuCO3 --> CuSO4 + CO2 + H2O

    Originally I found some weird ionic compound but then I realized that this broken down form would work better. However, until I do it, I have no way to prove that metal carbonates react in this way with sulphuric acid.


    Pierre

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  3. #2  
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    I am very sure the second equation is correct.
    About the first, I need to check.
    As far as I've heard the less volatile acid always displaces the more volatile one. Not sure whcih is which in this case.


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  4. #3  
    Forum Freshman Neecze's Avatar
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    I noticed that HCl likes to form chlorides. So is this equation correct?

    CuSO4 + 2HCl --> CuCl2 + H2SO4
    It's incorrect. In this way copper chloride cannot be formed even when you act hydrochloric acid on solid CuSO4 because H2SO4 is less voltaile than HCl. If you use solution of CuSO4 (water solution), this reaction also don't undergo`because all of the products are soluble in water.

    H2SO4 + CuCO3 --> CuSO4 + CO2 + H2O
    This reaction is correct since sulphuric acid is more stroneger than carbonic (CO2+H2O) (stronger acid displaces weaker one)
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  5. #4  
    Forum Bachelors Degree The P-manator's Avatar
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    Thanks everyone. If I understand correctly, the first equation, the H2SO4 will just create some ionic muddle with the CuCl2? If it was done at higher temperatures, could you get the H2SO4 to float away?
    Pierre

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