Citric Acid Essay Example for Free

citric virulent EssayIntroduction Soft drinks terminate acid and sugar. These substances contribute to tooth decay and therefore argon a cause for concern. In the first start up of the investigation well flyer the acidity in blackcurrant juice. Labels on black currant juice drinks usually state citric acid is present in the drink, but it doesnt give you the totality of how much it contains. Dilutable spongy drinks contain between 0. 15 2. 5% of citric acid research by The British Drinks connexion and therefore the second part of the experiment would be to determine the concentrations of blackcurrant juice in the diluted samples. probe 1 Measure the acidity of the blackcurrant juice drink In order to measure the acidity of the blackcurrant juice, disgusted titrate black current juice with 0. 1mol of sodium hydroxide and use a pH yard to measure its pH. proficiency The technique of this experiment is titration. It is a method of chemical analysis, which is used to dete rmine the book of account of concentration needed to react with an unknown solution. Equipments needed for titration Burette Conical Flask Clamp Technique of using titration method The measurement on the burette (cm3) tells you how much solution you subscribe to poured into the substance.This is useful to invite the amount of solution needed to balance with the substance. At the end of the burette, there is a small pink that allows you to control the amount of solution needed to pour into the substance. It is important to be accurate on the amount you want to put in. Therefore, right timing and quick reaction is the key skill to this experiment. There are two ways of measuring the pH pH indicator and pH meter. pH Indicator A pH indicator is a chemical compound. It shows the pH changes in the substance by changing its colourize when added. Different indicators have different colour.They only change its colour when a certain pH is reached. pH meter A pH meter is an electronic mac hine used to measure the pH in liquids. It has a special measuring probe called the glass electrode connected to the electronic meter. It will then measure and display the pH reading. Because the black current juice is darkly coloured, therefore pH indicator would non be the most suitable method for this experiment. Im going to use a pH meter for this experiment. The acquisition Many of the kooky drinks contain acids. It is use to balance the sweetness of the sugar present in the drinks.Citric Acid is one of the most common acid uses in soft drinks. Soft drink Blackcurrant juice contains Water, Sugar, Glucose Fructose Syrup (from wheat and maize), Blackcurrant Juice from Concentrate (4%), Citric Acid, Vitamin C, Preservatives (Sodium Benzoate, Sodium Bisulphate) and Colour (Anthocyanins) Citric Acid Citric Acid is an organic acid. We can find it from citrus fruits such as lemon and orange. It is added to soft drinks to create an acidic taste (sourness).Citric Acid also helps pres erve drinks from micro-organism because of its acidity. Micro-organism can only bristle and multiply in neutral condition. The reaction between Sodium hydroxide and Citric acid The pursuit equation shows the reaction of whats happening during the neutralisation reaction between Citric Acid and Sodium Hydroxide Citric Acid + Sodium Hydroxide Sodium citrate + Water C6H8O7 + 3NaOH C6H8O7Na3+ 3H2O From the equation above we have worked out 1 mole of citric acid reacts with 3 moles of sodium hydroxide (13 ratios). chart Demonstration.Strong and Weak Acids Acids are vary in strength. The strength of an acid is based on the yield of hydrogen ions in the atom. Strong acids Strong acids have a strong proclivity to donate Hydrogen+ ions. All of the strong acids such as hydrochloric acid, Sulphric acid and Nitric acid are all carbon% ionised in water. This mean all the strong acid would dissolve the reaction is fully bang and no unreacted substance remains in the solution. Weak acids Weak acids have a weak disposition to donate Hydrogen+ ions. The donation of hydrogen+ ions does not dissociate completely.