On this page you will learn how to preform a titration
Before we go over the procedure for preforming a titration, there is a few things you must know first.
So what is a titration?
Well a titration is when you take a solution that you known the concentration of (molarity) and you use that solution to determine the concentration of a unknown solution.
How do I find the molarity?
Good question! The molarity also known as the measurement for concentration, is found by using the formula: Molarity=moles of solute/liters of solution
So what is a titration?
Well a titration is when you take a solution that you known the concentration of (molarity) and you use that solution to determine the concentration of a unknown solution.
How do I find the molarity?
Good question! The molarity also known as the measurement for concentration, is found by using the formula: Molarity=moles of solute/liters of solution
Here is the procedure for titration
![Picture](/uploads/2/7/8/0/27808183/5439646.gif)
Procedure:
How about we look at a short video looking at this procedure in action!
- Get goggles, tie hair back and make sure you have no electronics near the experiment
- Take out one 200 cc flask and place it to the side
- Take out 2 100 cc beakers and label one of them acid and the other base
- Fill the beaker labeled base with 50 cc of sodium hydroxide
- Fill the beaker labeled acid with 50 cc hydrochloric acid
- Take out a pipette pump, one burette and a clamp stand
- Put the burette on the clamp stand
- Take a funnel and put about 10 cc of hydrochloric acid using the funnel to coat the inside of the burette.
- Pour out the hydrochloric and fill the burette with 20 cc of hydrochloric acid and make sure the tap is closed
- Now take the pipette pump and fill it with 10cc of the sodium hydroxide
- Put the 10cc of sodium hydroxide into the flask
- Use a pipette to take three drops of indicator (Phenolphthalein) and put it into the flask.
- Now place the flask under the burette and release the valve (MAKE SURE YOU MARK THE AMOUNT OF LIQUID INSIDE THE BURETTE BEFORE YOU RELEASE THE VALVE)
- Stir the flask with your hand as the acid is going into it
- Once you see the indicator begin to turn clear, turn the tap closed and look at how much liquid is in the burette
- Find the difference between the initial amount and the ending amount of acid.
- Now that you have a rough titration you can preform an exact titration.
- Clean out the flask and repeat steps 10-13
- Now this time you want to release the tap until it is 1cc before the ending amount you had last time.
- Turn the tap on just enough so the acid only drips out and once you see the indicator turn clear turn the tap off. Take the initial amount of acid and find the difference from the initial to the end amount of acid.
- Repeat steps 10-13 and 19-20 three times so you have multiple trials
- Find the average of the three exact titrations that you preformed. DO NOT INCLUDE THE ROUGH TITRATION.
- Next to find the molarity of the unknown solution you will do the following:
- Calculate the number of moles of solute present.
- Calculate the number of liters of solution present.
- Divide the number of moles of solute by the number of liters of solution.
How about we look at a short video looking at this procedure in action!