Titration of Vinegar LAB

Today we did a lab on the Titration of Household vinegar.

The problem: What is the Molar Concentration of Acetic Acid in household vinegar?

Materials used:

• Lab Stand
• Buret
• Buret Clamp
• Funnel
• Erlenmeyer Flask
• Vinegar
• 1.00 M naOH solution
• Phenolphthalein Indicator 
• Pipet
• Lab coats and goggles for protection

A picture depicting our first ever titration lab experiment.... o0o so exciting:

Procedure:

1. Set up the buret and clamp, place the funnel on top of the buret, and put on lab coats and goggles
2. Add 1.00 M of NaOH to the buret being careful not to overfill the buret
3. Pipet 10.00 mL of Vinegar solution into a dry erlenmeyer flask
4. Add 2-3 drops of Phenolphthalein indicator to erlenmeyer flask, this will tell you when the reactants fully react
5. Record the initial volume of NaOH on the buret using the meniscus
6. Carefully add NaOH through the buret into the Erlenmeyer Flask until solution changes from colourless to light pink
7. Record the final volume of NaOH in the buret
8. Repeat steps 1-3 times until consistent results are obtained

So the accepted value for the concentration of household vinegar is 0.85 M

We got 0.92 M through our trials

Our percent error is 8.2 %, not bad but not good either..... haha

-Post by Ren