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22 August, 00:29

Ca (s) + MgSO4 (AQ) - >CaSO4 (aq) + Mg

BaCl2 (aq) + K2So4 (aq) - >BaSo4 (s) + 2KCl

rewrite each reaction as a balanced net ionic equation.

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  1. 22 August, 04:02
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    First equation

    1) Write the balanced equation

    Ca (s) + MgSO4 (AQ) - >CaSO4 (aq) + Mg

    2) Write the ionic equatin showing the oxidation states (charges), next to each ion

    Ca (0) + Mg (2+) + SO4 (2-) - - - > Ca (2+) + SO4 (2-) + Mg (0)

    3) Remove the spectator ions (those that appear exactly the same at both sides). In this case remove SO4 (2-) from both sides to get:

    Net ionic equation

    Ca (0) + Mg (2+) - - - > Ca (2+) + Mg (0)

    Now go with the second equation

    1) Write the balanced equation

    BaCl2 (aq) + K2SO4 (aq) - >BaSO4 (s) + 2KCl

    2) Write the ionic equation

    Ba (2+) + 2Cl (1-) + 2K (1+) + SO4 (2-) - - - > Ba (2+) + SO4 (2-) + 2 K (1+) + 2Cl (1-)

    3) Remove the spectator ions.

    Here all the ions are spectator, because non of them changed the oxidation state. Then, there is not net ionic equation.
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