Acetic Acid Lab Report

1290 Words 6 Pages
The aim of this experiment is to determine through calculations the concentration of acetic acid content within a common white vinegar.

Apparatus / Materials

Plastic Tray
Electronic scales
Sodium hydroxide
Volumetric flask and lid
Glass funnel
Distilled water
Volumetric pipette/s (5mL, 20mL)
Conical flask
Retort Stand
Burette clamp
White Tile


Place the plastic tray on the electronic scales and press tare to set the wither to zero;
Weigh out 0.7993g of Sodium hydroxide in the plastic tray on electronic scales;
Rinse a 200ml Volumetric Flask with distilled water;
Rinse a glass funnel with distilled water;
Using the funnel add the Sodium hydroxide into the volumetric flask.
Run distilled water around the edge
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Safety equipment such as Apron, glasses, inclosed shoes, and gloves (when handling the phenolphthalein indicator) a required to prevent unknown or possibly hazardous substances from contact with skin. Handle equipment such as volumetric pipets, burettes, and flasks with care as they can smash and harm the user. Due to the corrosive nature of phenolphthalein indicator, acetic acid and sodium hydroxide, a source of running water nearby is advised for cleansing the area if contact with skin is made. Acetic acid is flammable therefore, no open flames, sparks, and smoking in the vicinity of the chemical.

Nick Talbot assisted throughout the practical investigation. We worked well together and shared our insights and knowledge with one another in order to create a smooth procedure. However, we did begin the practical quite unprepared for how quickly a practical must be completed and subsequently had troubles with time constraints. Which lead to us to being more efficient and cooperating better in order to complete the practical on with the allotted timeframe.


For calculations please see other sheet:

Through the investigation, it has been shown that the concentration of acetic acid in Woolworths home-brand vinegar is 0.62
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As it is required that you rely on the human eye to determine when the indicator displays the end-point of the titration.

Repeating an experiment using alternate equipment is crucial in revealing the accuracy of the titration. Different equipment assists in eliminating almost all forms of systematic errors. However, time constraints often determine whether or not this can be achieved, and in this case, there was not enough time to repeat the process with new equipment.
Repeating the experiment with the same equipment is also very important. The more results collected, leads to a higher precision and therefore and more statically correct mean.
This particular titration displayed the number and extent of random errors as quite significant. This is shown through the results table where the first experiment showed a titre of 31.4 and then the next two showing 32.1 and 32.2. The final two measurements are quite similar in scatter and could have easily been a systematic error when determining the end point of the procedure, however the first measurement is so far removed from the others that there was clearly a random error. This clear random error has therefore, corrupted the precision of the

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