To measure how much antacid is needed to neutralise some hydrochloric acid.
Hypothesis
It takes around 1.5-2.5 grams of Antacid to neutralise 50mL of Hydrochloric Acid.
Materials
Dilute Hydrochloric Acid (HCI) 0.1M
Small Flask (250mL)
50mL measuring cylinder
Methyl Orange indicator
Spatula/Spoon
Plastic petri dish
Scale
White piece of paper
Antacid powder
Method
Get approximately 10-15 grams of antacid and put it in the petri dish and write down your measurements. Also get a measuring cylinder and put in 50mL of diluted hydrochloric acid.
After measuring out the Diluted hydrochloric acid in the cylinder, pour it out into the flask and add 3-5 drops of methyl orange. Also add a piece of paper under the flask to prevent Diluted Hydrochloric acid to go on the table.
Use the Spatula/Spoon and put a tiny amount of antacid to the acid and give the flask a gentle stir. Keep doing this process until the liquid colour red changes to orange.
Re weigh petri dish and record your results
Results
(M1) Mass of petri dish + Antacid 13.3g
(M2) Mass of dish+ Unused antacid 11.5g
(M1-M2) Mass of antacid used 1.8g
Discussion
1.8 grams of antacid was required to neutralise 50mL of diluted hydrochloric acid.
Group 1 Group 2
(M1) Mass of petri dish + Antacid 13.3g 14.6g
(M2) Mass of dish+ Unused antacid 11.5g 13.4
(M1-M2) Mass of antacid used 1.8g 1.2g
These measurements were accurate because both groups started off with different amounts of antacid and both of them had the same answer. This also depends on how much antacid is in use in the first place and how much diluted hydrochloric acid is presented during the practical.
If our stomach contained 1 L of Diluted Hydrochloric acid it would take 36g of antacid to neutralise. It took 1.8 grams to neutralise 50mL and 50mL go into a 1 L 20 times so the equation to working out the amount of antacid required to neutralise the diluted hydrochloric acid is:
1.8×20=36...
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