Method of balancing redox Reaction,with example.
Answers
To balance a redox reaction, first take an equation and separate into two half reaction equations specifically oxidation and reduction, and balance them. Balance the following in an acidic solution. Step 2: Balance each of the half equations in this order: Atoms other than H and O
ex.....Step 1
First, we have to write the basic ionic form of the equation.Balancing redox reactions
Step 2
Divide the equation into two separate half reaction-oxidation half and reduction half.
Oxidation half
Balancing redox reactions
Reduction halfbalancing redox reactions
Step 3
In the third step of balancing redox reactions by half-reaction method, we will balance the atoms present in each half of the reaction except O and H atoms. In the example question, the oxidation part of the reaction in terms of Fe atoms is already balanced. Therefore, we will just balance the reduction part of the reaction. In this case, we will multiply Cr3+ by 2 in order to balance Chromium atoms.
balancing redox reactions
Step 4
We know that the reaction takes place in an acidic solution. Therefore, we have to add water molecules (H2O) for balancing the O atoms of the equation and H+ for balancing the H atoms in the equation. Now the equation is
balancing rddox reactions
Step 5
Now, we will need to balance the charges in both the half reactions. Therefore, we need to multiply the appropriate number to one or both the half reaction and make the number of electrons same. Balancing the oxidation half of the reaction
For the reduction half, there are 12 positive charges on the left side of the equation and 6 positive charges on the right side of the equation. Therefore, we need to add 6 more electrons on the left side of the equation to balance the reduction half.
balancing redox reactions
Now, to equate the electrons in two halves of the reactions, we will multiply 6 in the oxidation half reaction. Thus, we get
Step 6
The two halves of the equations are added to complete the overall reactions. After the addition of two reaction halves, cancel the electrons on both sides. The net ionic equation can be written as:
Step 7
Finally, we have to verify whether the equation consists of the same type, number, and charges on both sides of the equation. Moreover, the equation is completely balanced in terms of atoms and charges.
In case of a basic solution, we have to balance the atom similar to acidic solution. Then the equal number of OH– ions addition is done for each H+ ion, in both the halves of the equation. When the H+ ions and OH– ions will be present on the same side of the equation, we have to combine the ions and write H2O.
mark my answer as a brainlist
Answer:
Acidic Conditions
Solution.
Step 1: Separate the half-reactions. ...
Step 2: Balance elements other than O and H. ...
Step 3: Add H2O to balance oxygen. ...
Step 4: Balance hydrogen by adding protons (H+). ...
Step 5: Balance the charge of each equation with electrons. ...
Step 6: Scale the reactions so that the electrons are equal.