South Pasadena  AP Chemistry
Name _________________________________
Period ___ Date ___/___/___
16  Chemical Equilibrium
The ICE box is an organizational tool to keep track
of chemicals before, during, and after a chemical
reaction.
ANSWERS to THE I.C.E. BOX
Try these other problems.
1)
2N2O(g) + O2(g)
4NO(g)
Consider the reaction:
2N2O(g) + O2(g) 4NO(g)
If we started with 1.0 M N2O and 1.0 M O2 only,
the reaction might go until we have 2.0 M NO.
Follow the steps. Make sure you know what
happened in each step.
Notice that only the “change” row matches the
coefficients in the equation.
2N2O(g) + O2(g)
initial
1.0
1.0
initial
2.0
2.0
0
change
-1.0
-0.5
+2.0
ending
1.0
1.5
2.0
2)
2N2O(g) + O2(g)
4NO(g)
initial
2.0
2.0
0
4NO(g)
change
-1.0
-0.5
+2.0
0
ending
1.0
1.5
2.0
change
ending
2.0
3)
N2(g)
2N2O(g) + O2(g)
initial
1.0
1.0
4NO(g)
0
change
+2.0
ending
2.0
2.0
2.0
0
change
-0.5
-1.5
+1.0
ending
1.5
0.5
1.0
4)
4NO(g)
initial
1.0
1.0
0
change
-1.0
-0.5
+2.0
ending
2NH3(g)
initial
N2(g)
2N2O(g) + O2(g)
+ 3H2(g)
+ 3H2(g)
2NH3(g)
initial
1.0
2.0
0
change
-0.5
-1.5
+1.0
ending
0.5
0.5
1.0
MgCO3
MgO
2.0
5)
2N2O(g) + O2(g)
4NO(g)
+
CO2
initial
1.0
1.0
0
initial
2.0
0
0
change
-1.0
-0.5
+2.0
change
-1.5
+1.5
+1.5
ending
0
0.5
2.0
ending
0.5
1.5
1.5