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Thread: Write and Balance equations...

  1. #1 Write and Balance equations... 
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    Could someone please help me write and balance these equations:

    Hydrogen and Potassium=Potassium hydride

    Chlorine and hot Silicon=Silicon Tetrachloride

    Sulphuric acid reacts with Calcium to form Calcium sulphate and hydrogen gas

    Fe2 O3 + CO--->2Fe + CO2


    Trying to figure them out and I haven't done Chemistry in a couple of years!
    Thanks for ANY help

    :wink:

    Also I know these are easy equations.. I just want to make sure im doing them correct (i.e is the answer to the first: 2Na + H2 ---> 2NaH....... Oops ment to wirte K instead of Na!!)


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  3. #2  
    Forum Ph.D.
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    write out your attempts first.
    the first on is incorrect, clue,check you periodic table


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  4. #3  
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    Quote Originally Posted by fizzlooney
    write out your attempts first.
    the first on is incorrect, clue,check you periodic table
    I really thought the first was right. Whats the correct answer?

    Is the answer to the second one: 2Cl2 + Si Cl4?
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  5. #4  
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    The first one looks right to me. Sodium is +1, hydride is -1, so I would guess 2Na + H2 -> 2NaH.

    Edit: Woops, change Na to K. Same answer, though (2KH)
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  6. #5  
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    I'm reviewing this stuff for my chem class this semester so I'll give it a shot, I need the practise. Chances are I'll mess this up, but anyways...

    Hydrogen and Potassium=Potassium hydride
    H2 + 2K -> 2KH

    Chlorine and hot Silicon=Silicon Tetrachloride
    2Cl2 + Si -> SiCl4

    Sulphuric acid reacts with Calcium to form Calcium sulphate and hydrogen gas
    H2SO4 + Ca -> CaSO4 + H2
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  7. #6  
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    Thanks brushman for ur help :-D

    Are these correct:

    Hydrogen Sulphide burns in airto form water vapour and Sulphur:
    H2S + O2 ----> S + H2O

    Sodium Hydride reacts with water to form Sodium Hydroxide and Hydrogen gas:
    NaH + H2O----> NaOH + H2
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  8. #7  
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    Hydrogen Sulphide burns in airto form water vapour and Sulphur:
    H2S + O2 ----> S + H2O
    I think that's good except it needs to be balanced. So something like

    2H2S + O2 -> 2S + 2H2O

    Sodium Hydride reacts with water to form Sodium Hydroxide and Hydrogen gas:
    NaH + H2O----> NaOH + H2
    Looks good to me.
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  9. #8  
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    Thanks a mill brushman!! :-D
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  10. #9  
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    I am not so knowledgeable about this matter. So i have to learn it. Thanks for the post.
    plan solution commission de surendettement - commission de surendettement, vous pouvez demander un dossier de surendettement.plan solution commission de surendettement
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  11. #10  
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    Can anyone tell me if this equation is balanced correctly?

    2NH4 OH + 3H2 SO4 ----> (NH4)2 SO4 + 2H2O

    Thanks :-D
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  12. #11  
    Moderator Moderator AlexP's Avatar
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    Well, if you go element-by-element and count the number on each side of the reaction, you'll discover that your numbers for hydrogen and oxygen are off.
    "There is a kind of lazy pleasure in useless and out-of-the-way erudition." -Jorge Luis Borges
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  13. #12  
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    Quote Originally Posted by Chemboy
    Well, if you go element-by-element and count the number on each side of the reaction, you'll discover that your numbers for hydrogen and oxygen are off.
    Ok What about this?
    2NH4 OH + H2 SO4 ----> (NH4)2 SO4 + 2H2O

    (This isn't homework... im in my 20's and trying to revive chemistry knowledge so the answer would be much appreciated if im wrong :-D )
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  14. #13  
    Moderator Moderator AlexP's Avatar
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    that looks good to me.
    "There is a kind of lazy pleasure in useless and out-of-the-way erudition." -Jorge Luis Borges
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  15. #14  
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    Quote Originally Posted by Chemboy
    that looks good to me.
    WooHoo... Thank you!!
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