Essay by PaperNerd ContributorCollege, Undergraduate October 2001

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Antacid Aim: The aim of this experiment was to measure how much antacid in needed to neutralise some hydrochloric acid.

Materials: · Dilute hydrochloric acid · A small flask · 50mL measuring cylinder · Methyl orange indicator · Spatula · Antacid powder · Small disposable cup · A balance Method: A small amount of antacid was shovelled into the small cup. After this the mass of the cup and antacid was weighed and recorded. A measuring cylinder was used to measure 50mL of dilute hydrochloric acid, which was later poured into the flask. Approximately 3 to 4 drops of methyl orange indicator was also added to the flask. Ten scoops of antacid were used to achieve the desired effect, which was to change the colour of the water from red to yellow. After the water had turned yellow the remaining antacid was weighted and subtracted from the original amount of antacid.

The results were recorded.

Results: Mass of the cup and antacid = 1.4 + 1.87 = 3.27- 1.21 ( the weight of the extra cup ) = 2.06g Number of Scoops used = 10 Mass of cup and antacid left =1.81g Antacid used = 2.06 "“ 1.81 = .25g Conclusion: In this experiment I gained knowledge of the use of antacid and how it works. I also witnessed an extreme colour change, which happened in a matter of seconds after the tenth scoop was added. Another first was the use of the scientific balance that proved very useful for my knowledge and also proved useful throughout the experiment.