Asked by Sophia
Write the balanced net ionic equation for the following chemical reaction: A solution of sodium dichromate, Na2Cr2O7, is added to an acidic solution containing Fe2+ ions.
Answers
Answered by
DrBob222
The two balanced half equations are as follows:
Fe^2+ ==> Fe^3+ + e
[Cr2O7]^2- + 6e + 14H^+ ==> 2Cr^3+ + 7H2O
Now you multiply each equation by a number to make the electrons equal; i.e., multiply equation 1 by 6 and multiply equation 2 by 1. Add the two, cancel the electrons and you will have the final net ionic equation.
Fe^2+ ==> Fe^3+ + e
[Cr2O7]^2- + 6e + 14H^+ ==> 2Cr^3+ + 7H2O
Now you multiply each equation by a number to make the electrons equal; i.e., multiply equation 1 by 6 and multiply equation 2 by 1. Add the two, cancel the electrons and you will have the final net ionic equation.
Answered by
Anonymous
What happened to the Na?
Answered by
hel
Na is soluble and disappears because it is a spectator ion
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