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    1. write a half equation for reaction between calcium ions and hydroxide ions
    2. write a half equation for reaction between barium ions and chromium ions

    for 1. is this right:

    Ca2- + 2OH+ -> Ca(OH)2

    and for 2, what are the products?
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    (Original post by The Bright Beast)
    1. write a half equation for reaction between calcium ions and hydroxide ions
    2. write a half equation for reaction between barium ions and chromium ions

    for 1. is this right:

    Ca2- + 2OH+ -> Ca(OH)2

    and for 2, what are the products?
    For the first one you need to swap the signs around, Ca is 2+ and OH is 1-, you might want to add state symbols as well.

    Not sure about second one, will edit if i work it out.
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    haha thanks

    and from 1, I deduced 2 should be BaCrO4
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    These are ionic equations not half equations. Half equations are written for redox processes and involve electrons.
 
 
 
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