Introduction 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:
Indigestion Tablets Calcium Carbonate (CaCO3)
Hydrochloric Acid (HCL) solutions labelled 20, 30, 40, 50 60gdm-3 ( these can be 0. 0, 0. 75, 1. 00, 1. 25,1. 50 mol dm-3)
Trough or container
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] [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 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 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 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 an indigestion tablet reacts does not depend on the concentrations of hydrochloric acid. Method for the experiment There will be using various equipments to test the hypothesis. Firstly, I will measure 50cm3 of hydrochloric acid with lowest concentration into a conical flask. Then I will fill up the trough or the container up to the ? of it. Thereafter, I will fill the gas jar with water then, I will put my hand on top of the open end, and invert over the water in the trough.
Followed by, compress the delivery tube in to the gas jar. I will then put one indigestion tablet into the acid, and then quickly place the bung over the conical flask and start the timer. Finally, I will stop the timer when the gas jar is completely full of gas. Once I get my result I will record the time in a table as well as repeat the same procedure two times to get a consistent result. The whole procedure will repeated for the remaining concentrations of the hydrochloric acid and results will be recorded in a table. Below is the experimental set up for my investigation. Table of results Concentration of |Time taken to collect 54cm3 of carbon dioxide gas/sec | |hydrochloric acid/ | | |mol/dm3 | | | |1 |2 |3 |Average time | |1. 5 |126 |141 |121 |129 | |1. 5 |214 |243 |240 |222 | |1. 0 |237 |241 |307 |239 | |0. 75 |319 |318 |389 |314 | |0. 50 |388 |377 |376 |380 | pic] Analysis of Results Collision Theory Collusion theory is that reaction which is caused by the reactant particles in the experiment, the more particles in the concentration then there is more causation of the collision theory. 1. Temperature The rate of the chemical reaction can be raised by increasing the temperature. This rate can also be increased by increasing the concentration of a reactant in solution; in my experiment I have used the Hydrochloric Acid (HCl) with higher concentration and our body temperature.
This caused by the reactant particles to move quickly, and have more energy in order to collide often, and more of the collision result took in a reaction. 2. Surface Area The rate of a chemical reaction can also be increased by increasing the surface area of a solid reactant. But in my experiment I have dropped the whole tablet, instead of crushing the tablet. This has affected my experiment a lot because there could’ve been more collision, but since I have put the whole tablet inside that caused a small volume of space inside.
This didn’t allow the reactant particles to perform collision theory. It also made the rate at its average point. 3. Concentration My experiment’s dissolved reactant increased then they became crowded which again caused the particles to perform collision theory. This means that the hydrochloric acid (HCl) with higher concentration means that there is more particles with energyNo No please state this in a better way The result of the line graph shows that the higher the concentrations, the quicker it will react.
The hydrochloric acid with higher concentration means there is more reactant particles which will have more energy and be crowded. There is a greater of colliding, which will also allow the rate of reaction to increase. As the rate of the hydrochloric increases , the rate of chemical reaction becomes quicker. Please comment on the slope of the graph Conclusion The conclusion shows that the higher the concentration, then the reaction will be quicker as mentioned above. ———————– Gas Jar
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