Purpose: In this lab, experiments were carried out for studying

Chemistry Lab 4 Report

Experiment # 4

Title: Molarity of Vitamin C

Purpose: In this lab, experiments were carried out for studying

concentration of Vitamin C

Procedure:

Titration #1

• Prepare a 10ml sample which contains 0.4659 g vitamin C or

(ascorbic acid) with and water in a beaker

• Add acetic acid (2-3 drops) to bring a faster reaction along with

a small amount of starch for an indicator all in the buret.

• Titrate iodine using a buret to determine its molarity, as the

drops are added it starts to show a yellow color then disperses

over time a grayish purple starts to show will continue until the color stays over time at least 30 seconds. Overall, it leads to a

purple overall color.

Titration #2 (orange, lemon, lime)

• The fruit (orange, lemon, lime) has already been squeezed to

make juices.

• Prepare 20ml samples of each juice into the flask and next add

30ml of water with a small amount of 2 to 3 drops of starch indicator

• Next add acetic acid (2-3 drops ) to bring a quicker reaction

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