**Dilution** is the process in
which more solvent is added to a solution to lower its concentration.
There exists a simple mathematical relationship between the volumes
and molarities of the diluted and stock solutions:

M_{s} x V_{s} = M_{d} x V_{d} (1)

which is derived from the fact that the same amount of solute is present in both solutions.

Another way to get the diluted solution is to mix two 'like' solutions, which are solutions contain the same solute and the same solvent. The following formula is used for this case:

(M_{1} x V_{1}) + (M_{2} x V_{2})
= M_{d} x V_{d} (2)

*This module is to calculate final
solution concentration or other quantities using the above formulae
(1) and (2).*

**Example:***
What is the molarity of the solution by mixing 60.0 mL of 2.85 M KCl
solution with 150.0 mL of 1.10 M KCl Solution?*

This is one step process, enter the known data and press **Calculate**
to output the unknowns.

1. Select **Dilution** link from
the front page or **Dilution**
tab from the **Solution**
module. The Input and Output screen appears.

2. In the **Input** area, enter
the four known quantities with a proper significant figure. Select
the units associated with the input.

3. Click **Calculate** to output
the answer.

4. The **Show Work** area on the
right shows you step-by-step how your problem has been solved.

To start a new problem, click **Reset**.
All Input fields will be cleared. Follow Step 1-3 again.