To find out from a range Essay Example for Free

To find out from a range EssayTo find out from a range of yellow journalisms which tablet is the top hat one to countervail hydrochloric dose. Aim My aim is to determine which tablet is the best for stomach acid (neutralises the more or less hydrochloric acid). Scientific priming coat Acids and Alkalis Many of the substances that we use today atomic number 18 made up of either acids or alkalis. These be twain chemical opposites. Most acids are liquids. They are very corrosive and shtup kill or cut down skin cells, bacteria etc. Acids taste sharp and sour. Strong acids such as hydrochloric acid, sulphuric acid etc forgo hydrogen quickly whilst fallibleer acids such as citric acid and carbonic acid release hydrogen slowly. Strong acids measure at 1 or 2 on the pH scale of measurement and weak acids measure at 5 or 6 (The pH is a number on a scale which shows how acidic or alkaline a substance is). Most pure alkalis are solid. Like acids they are also very corrosive. M ost olfactory sensation soapy but near can burn flesh. Strong acids measure 13 or 14 on the pH scale and weak acids measure 8 or 9. Alkalis neutralise acids.At this point their pH level becomes 7 and they are known as neutral.(acid + alkali ? neutral event) (pH Scale) Hydrochloric acid/stomach acid When your stomach wall hold ins withal much hydrochloric acid you end up with a stomach-ache. Normally you are given an alkaline tablet to neutralise the acid. Universal Indicator Universal indicator can be in the form of makeup or liquid. It is used to show whether something is neutralised or whether it is an acid or alkali. E. g. if the indicator goes red it is acidic. Variables commutative variables are the ones that I cannot keep at a certain hail e. g. Hydrochloric acid.Dependent variables are the ones which I overhear to keep at a certain amount e. g. water. Prediction My prediction is that whichever tablet neutralises the most hydrochloric acid is the best. Method Firstly I impart measure 30 ml of water in a measuring cylinder. Secondly I will put this water into a plastic beaker and fragment a tablet into it. I will stir it with a stirring rod. After this I will add 7 drops of Universal indicator to the solution and stir it. I will put some Hydrochloric acid into a pipette and add it to the solution until it is neutral counting how many drops I add. in the long run I will do this test twice for from each one tablet. Fair Test To make this study fair firstly I will make sure that I use the equal amount of water and universal indicator. I will also dissolve the same amount of tablet each time. I will make sure that all the water used is all at the same temperature. Finally I shall do each experiment twice to ensure that I obtain stainless results. Equipment Measuring Cylinder, Water, Thermometer, Plastic Beaker, Stirring Rod, Pipette, Hydrochloric acid, Universal Indicator-Phenophatlein, Tablets Gaviscon, Settlers, Tums, Calcium Carbonate Appa ratus SafetyTo make this experiment safe we should make sure we hold all chemicals and equipment with care as acids and alkalis, which are going to be used in this experiment, are corrosive. We should make sure all hair and scarves are tied in good order so they do not get in the way. We should also wear goggles to protect our eyes. front Work First I measured and poured 25ml of sodium oxide into a plastic beaker. Then I added 7 drops of indicator until the solution turned pink. Then I measured 25ml of Hydrochloric acid and started adding this to the solution until it turned clear. This showed that the solution is neutral. Obtaining Results.Table of Results Coloured / Flavoured Tablet C. O. S. = Colour of Solution Analysis Graph of Results The above graph shows the medium amount of drops of Hydrochloric acid added to neutralise a tablet. Conclusions After having analysed my results I have come to realise that Gaviscon is the best tablet to neutralise Hydrochloric acid. (? Gaviscon + acid ? neutral) I had predicted that whichever tablet neutralises the most hydrochloric acid is the best. I did not signify a certain tablet. This ties in with my prediction as it does neutralise the most. Tums was the next best then Settlers and in the long run Calcium Carbonate.There are no anomalies in my work. Evaluation Accuracy and Reliability I feel that I could have made my results more accurate by doing the experiment another time as I could have miscounted the drops. I think the reliability of my results is fair but improvements could have been made to make it a 100 per cent accurate. Improvements Paying more attention to the different colours on the pH scale so that the overall pH number written could have been more accurate would have made improvements to the investigation. Extending the Investigation I could extend the investigation by using different types of water e. g. importunate and cold. I could also hav.