step B the scientific principle is the filtration of the purified water. The reason for the ash being boiled was to extract the iodine ions. D. The scientific principles behind step D was the adding of hydrogen peroxide solution to the remaining solution we had. The reason for this was so that the hydrogen peroxide could convert the iodine ions into iodine. E. In step E you had to transfer the mixture to a separating funnel. You then had to add 10cm3 of cyclohexane which was the scientific
Premium Chemistry Solvent Ethanol
The most common culprits are smoking‚ excessive stress‚ a lack of exercise‚ and iodine deficiencies in the diet. At present‚ seniors cannot override their genetics‚ but there is a lot that can be done about the lifestyle issues. In fact‚ most treatments for genetic-related thyroid problems are the same as the ones for issues arising
Premium Cancer Obesity Health care
Viviana Veber Bio 1510 Sec 21 Carbohydrates Introduction: The objective of this experiment was to identify the reaction of carbohydrates in Benedict’s test‚ Barfoed’s test and Iodine test. Carbohydrates are essential to living organisms‚ and the principal role of carbohydrates is the production of energy. Carbohydrates are groups of sugars that contain carbon‚ oxygen‚ and hydrogen in a 1:2:1 ratio. Three main units of carbohydrates are monosaccharides‚ disaccharides‚ and polysaccharides
Premium Glucose Carbohydrate Disaccharide
Introduction When we eat such things as bread‚ meat‚ and vegetables‚ they are not in a form that the body can use as nourishment. Our food and drink must be changed into smaller molecules of nutrients before they can be absorbed into the blood and carried to cells throughout the body. The things we eat turn into things such as carbohydrates‚ fats‚ and proteins. Carbohydrates are‚ any of a large group of organic compounds occurring in foods and living tissues and including sugars‚ starch‚ and cellulose
Premium Digestion Starch Protein
where as too high of a temperature (100 C) will cause denaturing in the enzyme and very little product will be produced‚ and lastly room temperature (37 C) will provide the most product of the temperatures being tested. In the presence of starch iodine turns
Free Enzyme Starch Amylase
with iodine and is oxidised to dehydroascorbic acid rapidly in acidic medium. first Considering iodine is only slightly soluble in water‚ the above titration cannot be performed directly by a standard iodine solution because of the insignificant end point. Thus‚ alternative method‚ back titration‚ will be employed. Two equations are involved. First‚ standard potassium iodate(V) (KIO3)‚ potassium iodate(KI) and dilute sulphuric acis(H2SO4) react to find out the excess quantity of iodine. Below
Premium Iodine Titration Vitamin C
stilbene (Figure 1). This reaction favored a crude Z-Stilbene crystal product over its E counterpart. When Z-Stilbene underwent photoisomerization with iodine for 1 hour it reconfigured almost exclusively into its more stable counterpart E-Stilbene. The reaction produced very low yield of 6.3% due to the nature of the reaction and the speed at which iodine reacts. The purity of E-Stilbene could have been increased by allowing the reaction to perform longer and to use a faster reactant such as Bromine
Premium Chemistry Ethanol Chemical reaction
does the ground exert on the ball to bring it to rest? [3] 16. (a) A car accelerates uniformly from 18 kmh-1 to 36 kmh-1 in 5s. Calculate: (i) acceleration (ii) distance covered by the car in that time. [3] (b) The length of minute hand of a clock is 14 cm. calculate the speed with which the tip of the minute hand moves. [2] [1] 17. (a) Define the term
Premium Velocity Speed Kinematics
Hypothesis : The diffusion of molecules across a semi permeable membrane is based on the size of the molecule Variables: a) Manipulated : Size of solute molecules b) Responding : Colour of solution c) Fixed : Temperature and time Materials : Iodine solution‚ Benedict’s solution‚ 1% starch suspension‚ 30% glucose solution and distilled water Apparatus : A Visking tube‚ cotton thread‚ test tubes‚ beaker and water bath Procedure - Soak the Visking tube in water for 5 minutes to soften it
Premium Iodine Semipermeable membrane Starch
preserved or exposed to oxygen. Chemicals and materials used: * Different kinds of juices : Cappy – Orange ‚ Cappy – Mango‚ Enjoi – Mango ‚ Tapozena – Lemonade‚ Rani – Orange‚ Tapozena – grapefruit * Fresh orange‚ grapefruit ‚ tangerine * Iodine solution I3-1 (Brownish red color) * Indicator : starch * Graduated cylinder * Flask * beaker * Droper * Squeezer * Knife Main chemical equations : C6H8O6 + I3- C6H6O6 + 3I- + 2H+ I3-
Premium Vitamin C Ascorbic acid