Red Cabbage Indicator Prac Write Up Essay Example for Free

Red Cabbage Indicator Prac Write Up EssayThe red bring up indicator shows how a usual household product such(prenominal) as red cabbage can make a suitable indicator and be able find out if a chemical is either and venereal disease, alkali or neutral. Acids ar a chemical that opposes with an alkali neutralising it producing water and a salt. Acids be also commonly found to be sour tasting. Acids react with metals, releasing enthalpy gas and leaving behind a salt they also can conduct electricity. Acids also readily give off hydrogen ions and have a pH level lower than 7. Some more common laboratory acids are Hydrochloric, Sulphuric and Nitric Acids. Sulphuric acids and water are use in car batteries as the electrolyte.Bases or alkali are a chemical that will react with acids and usually have a deplorable or soapy feeling on contact with skin. Bases readily accept hydrogen ions and has a pH level that is higher the 7. Bases have a acerbity taste and neutralise d by acids, producing water and a salt. Some common laboratory bases are Sodium Hydroxide, Potassium Hydroxide and Calcium Hydroxide. Stronger bases are commonly used today in many cleaning products.Indicators help us find wether if a chemical is an acid or base. The scale that is used to find wether a chemical is an acid or a base is the pH scale. The pH scale gives us an indication of the amount of hydrogen ions and goes from 1 14, one being the strongest acid and 14 being the strongest base. Many plants and flowers have natural substances which have indicating properties that allow them to be used as indicators. The red coloring material of red cabbage comes from a molecule called an anthocyanin. Very acidic solutions will turn anthocyanin a red colour. Neutral solutions result in a purplish colour. Alkalis solutions appear in greenish-yellow. Therefore, it is possible to determine the pH of a solution based on the colour it turns the anthocyanin in red cabbage juice.Materials Red cabbag e leaves (or red flower petals such as carnation, rose or geranium) 250ml beaker Hotplate or Bunsen burner, tripod, gauze mat and bench mat Spotting tile Dilute (0.1M) Hydrochloric acid Dilute (0.1M) sodium hydroxide solution Vinegar Distilled Water Filter Jar Cloudy Ammonia Sodium Chloride Lemon juice Shampoo Dish washing detergentMethodPart A Making the indicator1.The cabbage leaves were torn up and placed in the beaker2.The beaker was heated until the water was gently boiling. The cabbage leaves continued to boil until the water has been strongly coloured red.3.The cabbage leaves were allowed to cool and then to be filtered, strained or tackPart B Testing the indicator4.The cabbage water was added to all wells of the spotting tile and split equally between them.5.A known acid and base were placed on a spotting tile on the cabbage indicator. The colour was record.6.The remaining chemicals were placed on the spotting tile and were record as in step 5Safety AssessmentHydrochlori c acid (HCL) is a corrosive liquid Skin contact Exposer for a short pointedness/s of judgment of conviction may cause irritation and prolonged exposer may cause burns Eye Contact Exposer for a short period of time may cause irritation and may cause burns. Permanent eye damage may result. To avoid any contact with the substance wear evasive Clothing Safety Glasses Safety Gloves (Optional) Closed shoes Eye contact immediately hold eyelids open and rinse eye continuously for 5 ten minutes Skin contact immediately rinse the affected area under water until there is none of the chemical left on the skin Contact with any other chemical should be treated as this one. All protective gear listed above should be used in the experiment in the same way. Hair tied back Jewellery to be taken off