Balancing of Redox Reactions
CHXI08:REDOX REACTIONS

315095 The stoichiometric coefficients of \(\mathrm{\mathrm{MnO}_{4}^{-}, \mathrm{Pb}^{2+}}\) and \(\mathrm{\mathrm{H}_{2} \mathrm{O}}\) in the balanced chemical equation of the reaction
\(\rm{\mathrm{Mn}^{2+}+\mathrm{PbO}_{2}+\mathrm{H}^{+} \rightarrow \mathrm{MnO}_{4}^{-}+\mathrm{Pb}^{2+}+\mathrm{H}_{2} \mathrm{O},}\)respectively are

1 \(\mathrm{2,5,2}\)
2 \(\mathrm{1,4,2}\)
3 \(\mathrm{1,2,6}\)
4 \(\mathrm{1,2,3}\)
CHXI08:REDOX REACTIONS

315107 Boron carbide, \(\mathrm{B}_{4} \mathrm{C}\), is made by the high temperature reaction of boron oxide with graphite, yielding carbon monoxide as a byproduct.
\({ }_{-} \mathrm{B}_{2} \mathrm{O}_{3}+{ }_{-} \mathrm{C} \rightarrow \mathrm{B}_{4} \mathrm{C}+\) _CO
What is the total of the smallest coefficients for the reactants and products in the balanced equation?

1 9
2 10
3 15
4 16
CHXI08:REDOX REACTIONS

315096 The coefficients of \(\mathrm{I}^{-}, \mathrm{IO}_{3}^{-}\)and \(\mathrm{H}^{+}\)in the redox reaction,
\(\mathrm{I}^{-}+\mathrm{IO}_{3}^{-}+\mathrm{H}^{+} \rightarrow \mathrm{I}_{2}+\mathrm{H}_{2} \mathrm{O}\)
in the balanced form respectively are

1 \(5,1,6\)
2 \(1,5,6\)
3 \(6,1,5\)
4 \(5,6,1\)
CHXI08:REDOX REACTIONS

315097 For the redox reaction,
\(\mathrm{Zn}+\mathrm{NO}_{3}^{-} \rightarrow \mathrm{Zn}^{2+}+\mathrm{NH}_{4}^{+}\)
In basic medium, coefficients of \(\mathrm{Zn}, \mathrm{NO}_{3}^{-}\)and\(\mathrm{OH}^{-}\)in the balanced reaction respectively, are

1 \(4,1,7\)
2 \(7,4,1\)
3 \(4,1,10\)
4 \(1,4,10\)
CHXI08:REDOX REACTIONS

315095 The stoichiometric coefficients of \(\mathrm{\mathrm{MnO}_{4}^{-}, \mathrm{Pb}^{2+}}\) and \(\mathrm{\mathrm{H}_{2} \mathrm{O}}\) in the balanced chemical equation of the reaction
\(\rm{\mathrm{Mn}^{2+}+\mathrm{PbO}_{2}+\mathrm{H}^{+} \rightarrow \mathrm{MnO}_{4}^{-}+\mathrm{Pb}^{2+}+\mathrm{H}_{2} \mathrm{O},}\)respectively are

1 \(\mathrm{2,5,2}\)
2 \(\mathrm{1,4,2}\)
3 \(\mathrm{1,2,6}\)
4 \(\mathrm{1,2,3}\)
CHXI08:REDOX REACTIONS

315107 Boron carbide, \(\mathrm{B}_{4} \mathrm{C}\), is made by the high temperature reaction of boron oxide with graphite, yielding carbon monoxide as a byproduct.
\({ }_{-} \mathrm{B}_{2} \mathrm{O}_{3}+{ }_{-} \mathrm{C} \rightarrow \mathrm{B}_{4} \mathrm{C}+\) _CO
What is the total of the smallest coefficients for the reactants and products in the balanced equation?

1 9
2 10
3 15
4 16
CHXI08:REDOX REACTIONS

315096 The coefficients of \(\mathrm{I}^{-}, \mathrm{IO}_{3}^{-}\)and \(\mathrm{H}^{+}\)in the redox reaction,
\(\mathrm{I}^{-}+\mathrm{IO}_{3}^{-}+\mathrm{H}^{+} \rightarrow \mathrm{I}_{2}+\mathrm{H}_{2} \mathrm{O}\)
in the balanced form respectively are

1 \(5,1,6\)
2 \(1,5,6\)
3 \(6,1,5\)
4 \(5,6,1\)
CHXI08:REDOX REACTIONS

315097 For the redox reaction,
\(\mathrm{Zn}+\mathrm{NO}_{3}^{-} \rightarrow \mathrm{Zn}^{2+}+\mathrm{NH}_{4}^{+}\)
In basic medium, coefficients of \(\mathrm{Zn}, \mathrm{NO}_{3}^{-}\)and\(\mathrm{OH}^{-}\)in the balanced reaction respectively, are

1 \(4,1,7\)
2 \(7,4,1\)
3 \(4,1,10\)
4 \(1,4,10\)
CHXI08:REDOX REACTIONS

315095 The stoichiometric coefficients of \(\mathrm{\mathrm{MnO}_{4}^{-}, \mathrm{Pb}^{2+}}\) and \(\mathrm{\mathrm{H}_{2} \mathrm{O}}\) in the balanced chemical equation of the reaction
\(\rm{\mathrm{Mn}^{2+}+\mathrm{PbO}_{2}+\mathrm{H}^{+} \rightarrow \mathrm{MnO}_{4}^{-}+\mathrm{Pb}^{2+}+\mathrm{H}_{2} \mathrm{O},}\)respectively are

1 \(\mathrm{2,5,2}\)
2 \(\mathrm{1,4,2}\)
3 \(\mathrm{1,2,6}\)
4 \(\mathrm{1,2,3}\)
CHXI08:REDOX REACTIONS

315107 Boron carbide, \(\mathrm{B}_{4} \mathrm{C}\), is made by the high temperature reaction of boron oxide with graphite, yielding carbon monoxide as a byproduct.
\({ }_{-} \mathrm{B}_{2} \mathrm{O}_{3}+{ }_{-} \mathrm{C} \rightarrow \mathrm{B}_{4} \mathrm{C}+\) _CO
What is the total of the smallest coefficients for the reactants and products in the balanced equation?

1 9
2 10
3 15
4 16
CHXI08:REDOX REACTIONS

315096 The coefficients of \(\mathrm{I}^{-}, \mathrm{IO}_{3}^{-}\)and \(\mathrm{H}^{+}\)in the redox reaction,
\(\mathrm{I}^{-}+\mathrm{IO}_{3}^{-}+\mathrm{H}^{+} \rightarrow \mathrm{I}_{2}+\mathrm{H}_{2} \mathrm{O}\)
in the balanced form respectively are

1 \(5,1,6\)
2 \(1,5,6\)
3 \(6,1,5\)
4 \(5,6,1\)
CHXI08:REDOX REACTIONS

315097 For the redox reaction,
\(\mathrm{Zn}+\mathrm{NO}_{3}^{-} \rightarrow \mathrm{Zn}^{2+}+\mathrm{NH}_{4}^{+}\)
In basic medium, coefficients of \(\mathrm{Zn}, \mathrm{NO}_{3}^{-}\)and\(\mathrm{OH}^{-}\)in the balanced reaction respectively, are

1 \(4,1,7\)
2 \(7,4,1\)
3 \(4,1,10\)
4 \(1,4,10\)
CHXI08:REDOX REACTIONS

315095 The stoichiometric coefficients of \(\mathrm{\mathrm{MnO}_{4}^{-}, \mathrm{Pb}^{2+}}\) and \(\mathrm{\mathrm{H}_{2} \mathrm{O}}\) in the balanced chemical equation of the reaction
\(\rm{\mathrm{Mn}^{2+}+\mathrm{PbO}_{2}+\mathrm{H}^{+} \rightarrow \mathrm{MnO}_{4}^{-}+\mathrm{Pb}^{2+}+\mathrm{H}_{2} \mathrm{O},}\)respectively are

1 \(\mathrm{2,5,2}\)
2 \(\mathrm{1,4,2}\)
3 \(\mathrm{1,2,6}\)
4 \(\mathrm{1,2,3}\)
CHXI08:REDOX REACTIONS

315107 Boron carbide, \(\mathrm{B}_{4} \mathrm{C}\), is made by the high temperature reaction of boron oxide with graphite, yielding carbon monoxide as a byproduct.
\({ }_{-} \mathrm{B}_{2} \mathrm{O}_{3}+{ }_{-} \mathrm{C} \rightarrow \mathrm{B}_{4} \mathrm{C}+\) _CO
What is the total of the smallest coefficients for the reactants and products in the balanced equation?

1 9
2 10
3 15
4 16
CHXI08:REDOX REACTIONS

315096 The coefficients of \(\mathrm{I}^{-}, \mathrm{IO}_{3}^{-}\)and \(\mathrm{H}^{+}\)in the redox reaction,
\(\mathrm{I}^{-}+\mathrm{IO}_{3}^{-}+\mathrm{H}^{+} \rightarrow \mathrm{I}_{2}+\mathrm{H}_{2} \mathrm{O}\)
in the balanced form respectively are

1 \(5,1,6\)
2 \(1,5,6\)
3 \(6,1,5\)
4 \(5,6,1\)
CHXI08:REDOX REACTIONS

315097 For the redox reaction,
\(\mathrm{Zn}+\mathrm{NO}_{3}^{-} \rightarrow \mathrm{Zn}^{2+}+\mathrm{NH}_{4}^{+}\)
In basic medium, coefficients of \(\mathrm{Zn}, \mathrm{NO}_{3}^{-}\)and\(\mathrm{OH}^{-}\)in the balanced reaction respectively, are

1 \(4,1,7\)
2 \(7,4,1\)
3 \(4,1,10\)
4 \(1,4,10\)