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Balancing Chemicals

A chemical equation is balanced when each side has equal amount of each atom.

To balance this we must multiply upon both sides. If we have two chemicals we need to add... keep a space in between. If they will be multiplied, keep them together.

H2 +O2 -----> H2O

To balance this, we must multiply H2O by 2; so at to make this "O" equal to the 2 "O" s on the other side.


But by doing this, the H2 of the same side will also have to be multiplied by 2.


This will make 4 hydrogen atoms. Fortunately, the H2 of the other side can be multiplied by 2. O2 will not be effected.

Important: If they are separated by a plus, they can be considered 2 different values.
Al + O2 -----> Al2O3 is the schematic equation for aluminum reacting with oxygen to form aluminum oxide but it is NOT balanced.

4Al + 3O2 -----> 2Al2O3 is the balanced equation with all O an Al numbers balancing.

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10y ago
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13y ago

TO balance electrons in redox reactions first of all it is written in ionic form & then oxidation & reduction half reactions are written . now both the half reactions are balanced and electrons are added to the right hand side in oxidation half reaction according to difference in charge present on ions &to the left hand side in redution half reaction .Number of electrons to be added is seen from the deficiency of charge the reaction is having.

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13y ago

The net change in oxidation state of all the atoms of the reactants and the products must be zero, with increases of oxidation state positive and decreases negative.

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11y ago

The numbers of each kind of atom on each side of a chemical equation must be the same for the equation to be balanced.

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6y ago

The most important thing to consider is the number of electrons being transferred. Of course one also must consider the mass on each side of the equation.

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9y ago

mass,charge,and electrons

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10y ago

electrodes

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Q: What must be balanced in an oxidation-reduction reaction?
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