Titration is a technique that enables the ability to find the concentration(molarity) of an substance by using a known concentration of a substance. Usually burets are used in the titration process to increase accuracy by finely dropping in reactants. The Titrant or the known substance is placed into the buret and slowly dripped into a known volume(liters) of the unknown substance in till the reaction is complete. Once the reaction is complete you take the volume of the known substance dripped from the buret and multiply that number by the molarity (concentration) of the known substance. After you multiply these two numbers together you divide that product by the known volume(liters) of the unknown substance. Most the time indicators are added to signal the end of a chemical reaction.
The set up is usually similar to the image shown:
The formula for this process should look like this:
Molarity1. x Volume 1. = Molarity 2. x Volume 2.
This process can be used to find the concentration of any substance.
For example if you want to find the concentration of citric acid(C6H8O7) in fruit juice you would use the titration technique. Since you are trying to determine the concentration of the acid you can use a known base to neutralize. Once the process is finished you place the numbers into the formula. So say you used 25mL of fruit juice and titrated 17.6mL of a base with a 0.6M to neutralize the substance.
The equation would look like this:
1. 0.6M x 17.6mL = M2 x 25mL
2. 10.56/25 = M2 x 25mL/25
3. .4224 = M2
4. The concentration of citric acid in fruit juice would be 0.4224 Molar
All in all, that is how titration can help you find the concentration of any substance.