• Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month
  1. 1
  2. 2
  3. 3
  4. 4
  5. 5
  6. 6
  7. 7
  8. 8
  9. 9
  10. 10
  11. 11
  12. 12

Find out which antacid tablet works most efficiently using a technique called titration.

Extracts from this document...


Aim: To find out which antacid tablet works most efficiently using technique called titration. Measurement: The measurements will use a titration to find what volume of hydrochloric acid an antacid tablet will neutralise. Theory: Our stomachs produce gastric acid to aid in digestion. This acid is mainly composed of hydrochloric acid that is secreted by cells of the stomach lining called parietal cells. Excessive secretion of this acid is common and can lead to many stomach problems such as gastritis, gastric ulcers and peptic acid disease. These disorders are treated by antacids, which reduce the amount of acid in the stomach by various means. Most antacids contain weak bases and they neutralize the stomach acids by reacting with them chemically. These antacids are best taken for occasional stomach problems and they act very rapidly to provide relief. Some of the most common bases that are used as antacids are: * Mg (OH) 2, magnesium hydroxide * Al (OH) 3, aluminium hydroxide * NaHCO3, sodium bicarbonate * CaCO3, calcium carbonate These chemicals are used because they are weak bases - strong bases would lead to the risk of damaging the stomach if too much was taken. Bases neutralize acids by reacting with them to produce a salt and water. This chemical reaction of a weak base with stomach acid can be written in the general form: Weak base + hydrochloric acid --> salt + water A specific example of this chemical reaction is: Mg (OH) 2 + 2 HCl --> MgCl2 + 2 H2O There are other forms of antacid that work by less direct means. ...read more.


I will crush the antacid tablet and add water to it. I will then add Indicators to find out which is the best one that shows the colour change. I will then add hydrochloric acid bit by bit and then shake the conical flask to speed up the process. So you can find out the exact amount of acid that was neutralized. Safety * Wear goggles when handling corrosive solutions etc. * Wear gloves * Take of blazers & wear aprons * Tuck in ties * Report any breakages or spills Fair test To make it a fair test I will: * Use the same amount of water each time. * Use the same amount of bromophenol blue each time. By using too much you increase the volume even by the slight mm therefore decreasing its accuracy. * Use the same volumes of acid each time from the burette. * Either uses a whole tablet or a crushed tabled. By using crushed you allow more surface area therefore more reactions. * It is essential that none of the powder be spilt or wasted as this may have major effects on the amount of hydrochloric acid to be neutralised. Preliminary To find if initial plan works and which indicator shows best color change and what concentration of hydrochloric acid gives best results. 1 2 Average Buirette Start 0.2 0.1 0.15 Buirette Finish 10 11 10.5 Titration volume of acid used 9.8 10.9 10.35 The results above are Hydrochloric acid with a concentration of 0.5 Mole. ...read more.


Evaluation By analysing by results the experiment was successful to its aim and provided enough information for further investigation. But to make my data more accurate I could have done a number of things differently. This experiment is not very reliable and accurate because you cannot find out the exact amount of acid the antacid can neutralize. * Used a stirring machine to accurately stir each solution until it was fully neutralized. * Some of the tablet was stuck to the basin so I could prevent it by using a different basin which wont let any crushed tablet to stay behind. This will allow my experiment to be more accurate because it is decreasing the volume of the tablet and alternating the calculations. * Used less bromophenol blue as is again alternates the calculation as it increases the solutions volume. The experiment could have faulted due to the amount of indicator in the solution, which can affect it. * The Evaporation of the water from the solution in high levels of heat. If the acid was not added soon enough, the solution would become a suspension, and not all of the antacid will be put to use. * If I were to repeat this experiment I would carry out each tablet between 3 and 5 tests and use a greater range of tablets. Conclusion I conclude The Rennie indigestion tablet was tested to be the best. This was because it was able to neutralize most volume in dm� of hydrochloric acid. I believe to be due to its greater mass over the other tablets. It would have contained a greater amount of alkaline so could neutralise more acid. Sandip Singh Mangat 10E ...read more.

The above preview is unformatted text

This student written piece of work is one of many that can be found in our GCSE Aqueous Chemistry section.

Found what you're looking for?

  • Start learning 29% faster today
  • 150,000+ documents available
  • Just £6.99 a month

Not the one? Search for your essay title...
  • Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

See related essaysSee related essays

Related GCSE Aqueous Chemistry essays

  1. Indigestion Tablets Investigation

    The higher the temperature the shorter the time it takes for the tablet to completely react with the acid. This is because, according to collision theory, molecules with more energy will move about quicker and therefore the particles are more likely to collide so the reaction will occur more quickly.

  2. Investigation into the efficiency of various indigestion tablets.

    Even though this is only a very small amount, the experiment would be more precise if I could get this into the water. To do this, I will measure another 10 cm3 - using an accurate pipette - which I will use to rinse the plastic cup.

  1. How much Iron (II) in 100 grams of Spinach Oleracea?

    Procedural Errors It was difficult to judge the end point of the reaction even though a dramatic colour change took place. This was because a single extra drop of Potassium Manganate (VII) (aq) turned the solution a deeper shade of purple.

  2. Planning an Investigation To Determine The Effectiveness of Indigestion Tablets at Neutralising Excess Stomach ...

    stand, 4 100 ml beakers, 1 white tile, 4 conical flask, 1 top-pan balance, mortar and pestle, 1 funnel, 1 spatula, different brand indigestion tablets, hydrochloric acid, methyl orange, pipette and pipette filler, distilled water, stirring rod, measuring cylinder, labels, safety goggles, lab coat.

  1. To see which antacid tablet is the most efficient out of 4 samples.

    Once the tablet is crushed sufficiently it'll be put into the conical flask followed with exactly 10 ml of distilled water and then 5 drops of indicator afterwards (bromo phenol blue). The water should turn blue because the crushed tablet is alkaline and bromo phenol blue's indicator colour with alkali is blue.

  2. Indigestion - find out the composition of tablets which are for indigestion and compare ...

    Cooking destroys enzymes. Our bodies also have enzymes that assist in digesting food, however enzyme function diminishes with age. Failure to completely digest foods leads to incomplete assimilation of nutrients. The result is the development of a number of chronic medical conditions, food allergies included.

  1. Planning of Titration

    So 0.025 = g/106 so g = 2.650 This is the amount of Sodium Carbonate in grams needed to make a solution of concentration 0.10 mol dm-3 Na2CO3 n = 0.0250 mol v = 0.250 dm3 c = 0.10 mol dm-3 Instructions for carrying out Titration * Write a balanced equation of the Reaction * Wear Goggles and coat.

  2. The aim of this experiment is to find out the concentration of a solution ...

    if this was so, much of the mass weighed out would be water not the sodium carbonate, and you would end up with inaccurate results.) 7. Tare the digital balance. 8. Place a clean dry weighing boat onto the (2 decimal place)

  • Over 160,000 pieces
    of student written work
  • Annotated by
    experienced teachers
  • Ideas and feedback to
    improve your own work