• Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

To Investigate the Effectiveness of Antacid products you can buy

Extracts from this document...

Introduction

To Investigate the Effectiveness of Antacid products you can buy Introduction Aim: To compare Rennie tablets and Gaviscon tablets to determine which is the most effective antacid to alleviate indigestion The wall of the stomach contains gastric cells which secrete hydrochloric acid, which acts as a defence against bacteria in the stomach. Indigestion is caused by excess acid in the stomach, the stomach pH should be between pH1.5 and 2.5, if the pH exceeds this figure, and the mucus lining of the stomach will be damaged. Indigestion can be caused by diet; Antacids are pharmaceutical products that are used to treat indigestion. They are simple bases, made up of carbonates, hydroxides or metal oxides. They neutralise the excess stomach in the stomach, so that it drops down to the necessary pH level, preventing damage to the stomach. However by over eating and stress can stimulate excess production of hydrochloric acid in the stomach and can be uncomfortable. It is important that the acid does not get too excessive as it could eat away at the stomach mucus, resulting in painful ulcers. Antacids prevent the acid reacting with damaged stomach lining, allowing the ulcer to heal. ...read more.

Middle

Variables Variable Why they will have an effect? How will it be controlled? Mass of tablets If one tablet had a higher mass than the other, it would alter the volume of hydrochloric acid that is needed to neutralise it. Each set of tablets will be weighed to 1g. Concentration of hydrochloric acid If the reactant was more concentrated, it would mean there will be more collisions, which means the increased likelihood of the activation energy being reached. Therefore, the rate of reaction will increase. The same concentration of hydrochloric acid will be used in the experiment. Temperature The temperature is a factor which affects the rate of reaction. A rise in temperature will increase the rate of collisions between the particles. Therefore, increasing the chance of reaching the activation energy. It is difficult to control the temperature, as the solution may heat up and cool down slightly, especially due to stirring. However, the temperature of the solution will be measured before and after the reaction to see if the change in temperature creates any anomalies in the results. Indicator It will not be a fair test The same indicator will be used throughout the experiment. ...read more.

Conclusion

Gather all the apparatus needed for the investigation 2. Using the funnel, carefully pour 100cm3 of hydrochloric acid into the burette 3. Weigh out 1g of Gaviscon tablets and grind into powder using the pestle and mortar 4. Carefully transfer the powdered tablets into a beaker, ensuring all traces of powder has been removed and add 10cm3 of distilled water 5. Add 7 drops of phenolphthalein indicator and place the beaker under the burette. 6. Remove the funnel and add 5cm3 of hydrochloric acid to the beaker and stir with a stirring rod 7. Continue adding hydrochloric acid in steps of 1cm3 or less until the solution turns colourless 8. Record the volume of hydrochloric acid added. This is the volume that is needed to neutralise the Gaviscon tablet. 9. Refill the burette to 100cm3 and repeat this process with the Rennie tablet 10. Repeat entire method at least three times Safety Precautions * As hydrochloric acid is a strong acid, extra precaution must be taken, lab coats must be worn * Safety glasses must be worn during the entire experiment especially when adding acid to the burette ?? ?? ?? ?? Antacid Coursework ...read more.

The above preview is unformatted text

This student written piece of work is one of many that can be found in our International Baccalaureate 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 International Baccalaureate Chemistry essays

  1. Calcium Carbonate and Hydrochloric Acid

    52,4632 570 52,417 210 52,4564 600 52,4136 240 52,4502 630 52,4122 270 52,4451 660 52,4100 300 52,4414 690 52,4069 330 52,4393 720 52,4068 360 52,4358 750 52,4068 390 52,4318 780 52,4068 Time (sec) Weight (g) Time (sec) Weight (g) 0 52,7463 30 52,7314 390 52,6827 60 52,7256 420 52,6799 90

  2. Investigate the rate of reaction of luminol in various factors. The objective was to ...

    Concentration (M) y value x value Rate of reaction (y/x) 0.03 0.011 15.161 7.26?10-4 0.06 0.022 17.097 1.29?10-3 0.09 0.215 138.065 1.56?10-3 0.12 0.271 116.774 2.32?10-3 0.15 0.325 101.935 3.19?10-3 0.27 0.035 5.806 6.03?10-3 0.30 0.030 3.87 7.75?10-3 It seems the values are not adequate as some of them are

  1. Aspirin Tablets Lab

    The initial number of moles can be calculated. Subtracting the number of moles of excess of NaOH from the initial number of moles we obtain the number of moles that reacted in the reaction of hydrolysis. It was already mentioned that in the reaction of hydrolysis of the acetylsalicylic acid with sodium hydroxide the ratio in which the two substrates react is 1:2.

  2. A comparison of various proprieary antacids

    However I predict that the Tums will neutralize a greater number of moles of hydrochloric acid compared to Eno powder, because unlike Eno there is no other acid ingredient to counteract the neutralizing effect of the antacid. I therefore predict that the sodium hydroxide will have to neutralize less excess

  1. Aim: To study and investigate the effect of temperature on the rate of ...

    Limitations * The limitation of this experiment is that we arrive to the general conclusion about the relationship between temperature and rate of reaction through studying one individual reaction only, and no test is done to verify that this is not specific to this reaction.

  2. Aim: To calculate the activation energy (EA) for the reaction between Br- and BrO3- ...

    This can be observed in the Maxwell-Botlzmann curve. Fig 1: Maxwell-Boltzmann distribution curves for particles at 273 and 283 K. The diagram above shows that at higher temperatures, more particles have higher values for kinetic energy and the peak of the curve shifts to the right. At higher temperatures there is an increase in collision frequency due to

  1. Acids/Bases Design Lab. How does a change in the pH value of a solution ...

    As part of the procedure, the investigator is measuring out a pre-determined volume of concentrated hydrochloric acid (12 mol dm-3) and eventually it is combined with a larger quantity of distilled water. The distilled water to be used for all of these should be distilled water, and come from the same source water tank.

  2. FInding the percentage purity of CACO3 in egg shell

    were taken in order to neutralize the acid and the base and find the acid left over and hence complete the back titration process Trial Start point (cm3 /±0.02 cm3) End point (cm3 /±0.02 cm3) Titre Value (cm3 /±0.02 cm3)

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