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    Asoom's Avatar
    Asoom Posts: 52, Reputation: 1
    Junior Member

    Apr 29, 2009, 02:15 PM
    Write the balance equation
    Could you please help me to complete this equation , I get the major product but I didn't how to write others.. :confused:

    1- Al^3+ + NH4Cl + 3NH4OH... > Al(OH)3 +

    2- Ni^2+ + NH4Cl + NH4OH + Na2S... > NiS +

    3- Ca^2+ + NH4Cl + NH4OH + (NH4)2CO3... > CaCO3 +

    4- Na^+ + Na3Co(NO2)6^3-... >

    5- (Solution + glass rod immersed in conc .HCl then on direct flame ) with Ca^2+

    6- Pb^2+ + 2HCl... > PbCl2 + (2H^+ or H2)

    7- If there is no reaction between two reactants , then when I write the equation it will be the product same as the reactants ?
    Perito's Avatar
    Perito Posts: 3,139, Reputation: 150
    Ultra Member

    Apr 30, 2009, 05:01 AM


    The other ions are spectator ions -- they don't enter into the equation. I'm not sure what the counter-ion was to the Al+3. You can put them in, if you wish, but it really doesn't matter (except possibly to your instructor).

    The other problems are done the same way, except #5. I don't get that one.
    Unknown008's Avatar
    Unknown008 Posts: 8,076, Reputation: 723
    Uber Member

    Apr 30, 2009, 11:35 AM

    I think you'll get a red flame... the flame test, you know (btw, I haven't done that at school yet, but this is my bet)

    The products are surely CaO and another compound from the anion in the solution.
    Perito's Avatar
    Perito Posts: 3,139, Reputation: 150
    Ultra Member

    Apr 30, 2009, 12:57 PM

    Calcium does give a red flame. However, the glass rod will emit a yellow flame that will entirely overwhelm the red from the calcium.

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