Kinetics Kinetics 6.1 Rates of reaction 6.2 Collision theory 6 16.1 Rate Expression (AHL) 16.2 Reaction mechanism (AHL) 16.3 Activation energy (AHL) 6.1 Rates of reaction 6.1.1 Define the term rate of reaction. 6.1.2 Describe suitable experimental procedures for measuring rates of reactions. 6.1.3 Analyse data from rate experiments. © IBO 2007 Figure 601 An explosion is a quick reaction D ifferent chemical reactions occur at different rates (i.e. speeds)
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iodometry- the winkler’s method. Apparatus: volumetric pipette‚ 3 conical flask‚ burette‚ burette clamp‚ Pasteur pipette‚ reagent bottle‚ conical flask stopper‚ retord stand‚ white tile Materials: 2 ml manganese sulphate solution‚ 2 ml alkaline-iodine solution‚ 0.025M sodium thiosulphate solution‚ 2ml concentration sulphuric acid‚ starch solution Procedure 1. When sampling water‚ care must be taken to ensure that a good representative sample of the water to be analyzed is obtained. For most
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oxygen in the water. If acid isn’t added the solution will quickly start to turn yellow due to formation of MnO2. If this happens anyway‚ add some more sulphuric acid to reverse the process. The solution should be clear with a slight green tinge. Chapter 15 – Volumetric analysis (Redox titrations) To prepare a standard solution of ammonium iron sulphate and use this solution to standardise a solution of potassium permanganate. Potassium permanganate (KMnO 4 ) is a powerful oxidizing agent and is
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The autoimmune diseases are‚ simply put‚ the process which the immune system attacks its own healthy tissues and organs. How this works is‚ our bodies have an immune system‚ which is a complex network of special cells and organs that defends the body from germs and other foreign invaders. At the core of the immune system is the ability to tell the difference between self and nonself‚ especially if there’s a flaw the body makes. When this happens‚ the body makes autoantibodies that attack normal cells
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because there was no colour change revealing the presents of proteins Part 2: Test for Starch Iodine Test for Starch Test Tube Contents Colour Change Conclusions 1 Starch suspension White (starch) and brown (iodine) > dark blue-black Therefore starch is present due to the change of colour in the solution 2 Distilled water Transparent (water) and brown (iodine) > translucent orange (diluted iodine) Therefore starch is not present due to the lack of reaction in the solution Part 3: Tests for
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G-250 * Bradford Reagent * Bovine Serum Albumin = BSA * Reagent blank = test tube #1 = 0mL BSA stock solution‚ 1mL distilled H2O * 595nm * Plot A595 vs concentration of BSA Experiment 4: Enzymatic Activity of Salivary Amylase * Iodine test – presence of starch * 1/t vs temperature/pH Experiment 5: General and Specific Tests for Carbohydrates | Reagents | Principle | Test for | Positive Result | Negative Result | Molisch | Molisch Reagent ‚Conc. H2SO4 | hydrolysis‚ dehydration
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depending on sugar concentration. A green precipitate means a little glucose was present. A red precipitate means glucose is present in vast amounts. Food Test 2: Test for Starch – with Iodine solution. Iodine solution is used to identify the presence of starch- a complex carbohydrate. Iodine solution (potassium iodide solution) reacts with amylase – a type of starch – whereby a blue-black polyiodide complex is formed. Method 1) Mix smalls amount of each food samples (i.e.‚ Egg lumen
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medications used for this are Tapazol and Propyl-Thyracil. Radioactive iodine is taken either as a liquid or in capsule form and is used to destroy the thyroid gland or any other thyroid cells. The duration of the treatment can be extended to 8-18 months. The surgery that is mainly used for Graves’ disease is called Thyroidectomy. This is a procedure that removes a portion or all of the thyroid gland. If you have had radioactive iodine treatment or surgery‚ you will need to take replacement thyroid hormones
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The first lab will investigate the movement of glucose and starch across a selectively permeable membrane through a process of diffusion. The movement of a solute through this membrane is called dialysis . Diffusion is a form of passive transport. It is the movement of molecules from areas of higher concentration to those of lower concentration‚ until there is an even concentration. This movement is random because it is a result of kinetic energy. Diffusion is a slow process‚ but there are many factors
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Austin Peay State University Department of Chemistry CHEM 1021 IDENTIFYING CARBOHYDRATES (adapted from Blackburn et al.‚ Laboratory Manual to Accompany World of Chemistry‚ 2nd ed.‚ (1996) Saunders College Publishing: Fort Worth) Purpose: To become familiar with some of the characteristic reaction of carbohydrates. To identify an unknown carbohydrate. Caution: Wear eye protection because of the possible shattering of dropped glassware and because acids are used in this experiment
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