Chemistry Examples

$H_{2} M n O_{3}$

Step 1

Since $M n$ is in column $3$ of the periodic table, it will share $3$ electrons and use an oxidation state of $3$ .

$M n = 1 (3) = 3$

Step 2

Since $O$ is in column $6$ of the periodic table, it will share $6$ electrons and use an oxidation state of $6$ .

$O = 3 (- 2) = - 6$

Step 3

To find the oxidation state of $H$ , set up an equation of each oxidation state found earlier and set it equal to $0$ .

$3 - 6 + 2 x = 0$

Step 4

Solve the equation for $x$ .

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Step 4.1

Add $3$ and $- 6$ .

$- 3 + 2 x = 0$

Step 4.2

Add $3$ to both sides of the equation.

$2 x = 3$

Step 4.3

Divide each term in $2 x = 3$ by $2$ and simplify.

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Step 4.3.1

Divide each term in $2 x = 3$ by $2$ .

$\frac{2 x}{2} = \frac{3}{2}$

Step 4.3.2

Simplify the left side.

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Step 4.3.2.1

Cancel the common factor of $2$ .

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Step 4.3.2.1.1

Cancel the common factor.

$\frac{2 x}{2} = \frac{3}{2}$

Step 4.3.2.1.2

Divide $x$ by $1$ .

$x = \frac{3}{2}$

Step 5

$H$ is using an oxidation state of $\frac{3}{2}$ .

$\frac{3}{2}$

Step 6

This is the full list of oxidation states for this molecule.

$M n = 3, O = - 6, H = \frac{3}{2}$