evidence because during the Iodine test it didn’t turn purple or blackish so there was no starch‚ and Evidence is like E because there was bubbles during the vinegar test. That’s why I know that Miss Tavaglione’s Dr. Stench’s Deodorizing Foot Dust was the evidence and the mysterious powder at the scene. That’s how I know Miss Tavaglione took the gradebook. The Most useful powder test I used was the heat test because E‚ B‚ and evidence all had similar reactions during
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enough to diffuse and the starch is too large to diffuse out. By detecting the presence of particular molecules on each side of the dialysis tubing‚ we determined which molecules passed through the tubing and which did not. When the starch molecules react with iodine to form a dark blue compound. We used the I2K1 to test for starch and the Benedicts test to test for reducing sugar. Based on the information my hypothesis for this experiment is that the water and the iodine would diffuse through‚ because
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QUESTIONS 1. What are other sources of glycogen? Of starch? a. Other sources of glycogen- Aside from the liver‚ it can also be found in skeletal muscles (for energy during strenuous exercise). It also occurs in tissues including adipose tissues‚ heart muscles‚ kidneys and the brain. It is also found in yeast‚ bacteria‚ fungi‚ molds and algae‚ oysters‚ and shellfish. b. Other sources of starch- Foods that are high in starch include breads‚ grains‚ cereals‚ pasta‚ rice‚ potatoes‚ peas
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AgBr(s) Any soluble bromide gives a silver bromide precipitate. Iodine (i) solid or (ii) solution A very dark solid (i) Gently heat the dark coloured solid. (ii) Test aqueous solution or solid with starch solution. (i) Gives brilliant purple vapour. (ii) A blue black colour. (i) Iodine forms a distinctive coloured vapour. (ii) Forms a blue-black complex with starch and in biology the test is used to detect starch with iodine solution. Tests for Halide Ions In test (i) the silver nitrate
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NAME; BOAKYE SAMUEL ANSAH COURSE; BSC.CHEMISTRY YEAR; ONE INDEX NUMBER; 1026613
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Abstract This experiment was carried out to perform staining methods on microbes‚ explain the mechanisms of staining‚ namely‚ simple staining‚ and learn how to use the microscope. The experiment setting was kept as sterile as possible when conducting the experiment. The microbes under the microscope were drawn out and labelled. In conclusion‚ different staining techniques are used to determine the presence of certain exterior structures of the bacteria like the cell envelope or just to identify
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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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Abstract In this lab the structures of various cells were viewed through a compound microscope. The bacteria in yogurt was viewed a long with a slice of potato‚ and a thin skin of red onion. The potato was dyed with iodine while the red onion was dyed with methane blue. The students had to assemble the first three slides. Two more slides were provided these are the yeast and protozoa cells. Those two are also viewed with the same microscope. Introduction Cytology
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Digestion Self-design Practical: The effect of pH on enzyme activity Rationale Amylase is an enzyme involved in the digestion system which catalyses the breakdown of starch into sugars. It is not only present in human saliva but also in the pancreas‚ where it hydrolyses dietary starch into disaccharides and trisaccharides which are converted by other enzymes to glucose to supply the body with energy. pH has an effect on the activity of all enzymes‚ including amylase. As the pH level increases
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recrystallization with ethyl acetate. MATERIALS USED: Test Tubes Pasteur Pipette Salicylic acid acetic anhydride Sulfuric acid 125 mL Erlenmeyer flask Scale Water Hot water bath Ice Bath Buchner Fünnel 1% Ferric Chloride Ethyl acetate Glass Rod Iodine Aspirin Tablet Commercial Aspirin tablet METHODS Part A 1. 2.0 g of salicylic acid was placed in a 125 mL Erlenmeyer flask. 2. 5.0 mL of acetic anhydride was added to the flask and five drops of concentrated sulfuric acid was also added
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