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Help with equation
Posted: Tue Oct 31, 2017 5:40 pm
by jcevans7
Can't solve this... Keep winding up with a negative which I know it means it isn't balanced. Here is the equation.
Solid calcium reacts with aqueous nitric acid to form aqueous calcium nitrate, gaseous dinitrogen monoxide and water.
Posted: Wed Nov 01, 2017 9:06 am
by ChenBeier
Ca => Ca2+ + 2 e- Oxidation
2 HNO3 to N2O Redox pair
2HNO3 + 8 H+ => N2O + 5 H2O Elimination of Oxygen to form water
2HNO3 + 8 H+ + 8 e-=> N2O + 5 H2O Charge balance
smallest common multiple of electrons is 8
means 4 Ca => 4 Ca2+ + 8 e-
Addition of both equations
2HNO3 + 8 H+ + 4 Ca => 4 Ca 2+ + N2O + 5 H2O
Addition of NO3-
10 HNO3 + 4 Ca => 4 Ca(NO3)2 +N2O + 5 H2O
finished
Posted: Wed Nov 01, 2017 12:51 pm
by jcevans7
Man, that is awesome! I never got that far. This was by far the hardest equation I have seen. Thank you.