Investigation of Hydrochloric Acid with Indigestion Tablet

Topics: Hydrochloric acid, Carbon dioxide, Calcium carbonate Pages: 6 (1243 words) Published: March 25, 2013

In this coursework I will be talking about the experiments, which I have done over two weeks. This gave different results by using different concentrations of hydrochloric acids (HCl) and indigestion relief tablet. I will also mention the time which was taken in the experiment, to see how fast the hydrochloric acid took with indigestion tablet with different concentrations. Indigestion tablets are alkali and they are used for to neutralise the excess acid in the stomach.

Indigestion Tablet

Indigestion is caused by excess acid in the stomach. The tablets neutralise some of this Acid and this is known as ‘Neutralization’ since it neutralizes the acid. In this experiment the amount of acid neutralised by one tablet is found. This may be considered a direct measurement of the effectiveness of the tablet.

Requirements for the experiment:-[pic]

• Indigestion Tablets Calcium Carbonate (CaCO3)
• Gas Jar
• Clamp Stand
• Hydrochloric Acid (HCL) solutions labelled 20, 30, 40, 50 60gdm-3 ( these can be 0.50, 0.75, 1.00, 1.25,1.50 mol dm-3) • Trough or container
• Measuring cylinder
• Timer.
• Bung
• Delivery Tube
• Conical Flask 50 cm3

Indigestion Tablets

An indigestion relief tablets alkali in solution, so that it can easily neutralize the excess hydrochloric acid in the stomach. The indigestion tablets to be used in the experiment was purchased from Super Drug

Gas Jar

A gas jar is a straight and thin cylindrical tube with ml units. This is used to collect gas or generate in the laboratory. In my investigation gas jar will be used to collect and measure the amount of carbon dioxide gas released during the investigation.

[pic]Clamp Stand

Clamp stand is really useful and it gets attached to the burette or any flask and it allows it to stay in its position. Otherwise, there’s a possibility of dispensing more amount of liquid than its normal measurements. In my investigation conical flask will be attached to the clamp stand so that it can be connected to the delivery tube which will in turn be connected to the gas jar through the water in the trough.

Hydrochloric Acid Solution

Our stomach produces hydrochloric acid which kills bacteria which maybe present in our food and also create acidic conditions for the enzymes to work properly. If the stomach contains too much acid then it can cause pain and it is called ‘INDIGESTION.’ Sometimes the acid escapes from top of the stomach which causes pain in the tube leading to the mouth this is called ‘heartburn’

The equation of hydrochloric acid being neutralized by sodium bicarbonate looks like this: 2HCl + CaCO3-> CaCl2+ H2O+ CO2

Delivery Tube

Delivery tube delivers the gas in to collecting vessels or container, but in this case it is going to go in a burette. Delivery tube also allows the gases to go through it; this will make the result to be accurate.


Trough is used for filling up the water, and it holds in the water, as well as the burette where gases put themselves off. The delivery tube gets clamped into the water and connected to the gas jar. It usually looks like a normal flat based bowl.


Bung is a big chunk of rubber, which act as seal in a conical flask. This allows the gas to be delivered through the delivery tube, and the delivery tube is connected with the bung since it has a hole. It is really useful in the experiment therefore no gas can be released outside.


Timer is there to get the results of the different solutions of hydrochloric acids. It makes the result really convenient as well as precise.

Conical Flask

This is scientific equipment which is usually seen in the lab. In the experiment it was used for to hold the hydrochloric acid and the indigestion tablet. It gets sealed at the top by a bung.

Hypothesis: In this experiment I will test the hypothesis that; how quickly...
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