What is the coefficient for OH−(aq) when SO3 2−(aq) + MnO4 −(aq) → SO4 2−(aq) + Mn2+(aq) is balanced in basic aqueous solution?
6
3
2
1
6
What is the coefficient for H2O(l) when S2−(aq) + NO3 −(aq) → S(s) + NO(g) is balanced in acidic aqueous solution?
4
2
1
3
4
What is the coefficient for H2O(l) when MnO4 −(aq) + Fe2+(aq)→ Mn2+(aq) + Fe3+(aq) is balanced in acidic aqueous solution?
4
2
6
1
4
What is the coefficient for H2O(l) when Sn2+(aq) + IO3 −(aq) → Sn4+(aq) + I−(aq) is balanced in acidic aqueous solution?
3
2
1
4
3
What is the coefficient for H2O(l) when PbO2(s) + I2(s) → Pb2+(aq) + IO3 −(aq) is balanced in acidic aqueous solution?
4
2
10
6
4
What is the coefficient for H2O(l) when SO4 2−(aq) + Br2(l) → S2O3 2−(aq) + BrO3 −(aq) is balanced in acidic aqueous solution?
1
6
12
24
1
What is the coefficient for OH−(aq) when SO4 2−(aq)+ Br2(l) → S2O3 2−(aq) + BrO3 −(aq) is balanced in basic aqueous solution?
2
1
3
4
2
What is the coefficient for H2O(l) when SO3 2−(aq) + MnO4 −(aq) → SO4 2−(aq) + Mn2+(aq) is balanced in acidic aqueous solution?
3
1
2
6
3
What is the coefficient for OH−(aq) when PbO2(s) + I2(s) → Pb2+(aq) + IO3 −(aq) is balanced in basic aqueous solution?
8
6
4
2
8
What is the coefficient for OH−(aq) when MnO4 −(aq) + Fe2+(aq) → Mn2+(aq) + Fe3+(aq) is balanced in basic aqueous solution?
8
6
4
2
8
How many electrons are needed to balance each of the following half-reactions?
Reduction half-reaction: Fe3+(aq) + _e − → Fe(s)
Oxidation half-reaction: Al(s) → Al3+(aq)+ _e −
Overall reaction: Fe3+(aq) + Al(s) → Fe(s) + Al3+(aq)
3
0
6
2
3
What is the coefficient for OH−(aq) when S2−(aq) + NO3 −(aq) → S(s) + NO(g) is balanced in basic aqueous solution?
8
4
6
2
8