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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substance #2 Paper towels 600 ml beaker Brown paper Biuret reagent Benedict’s solution Iodine solution Procedure: 1. Place test tubes in the test tube rack. Use the grease pencil to label each test tube based on the substance that will be placed in them. 2. To test for starches‚ fill each test tube with 5ml of the substance indicated by the label. 3. Add 5 drops of iodine solution to each test tube. The contents will change to a blue-black color in the presence of starch
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Oxidation and Reduction Mnemonic: OILRIG Oxidation Is Loss‚ Reduction Is Gain Oxidation → the loss of electrons from an atom or an ion→ always happens at anode (positive electrode) → think anOde (O2 in the electrolysis of water xp) Redox reactions: Reactions involving the transfer of electrons e.g. burning‚ rusting‚ photosynthesis‚ respiration and the browning of apples. happens in three types of reactions: 1. addition of oxygen 2. removal of hydrogen 3. increase in valency (how easily an atom
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Identifying Organic Compounds 2. Purpose/Problem: I am doing this experiment to find out what kind of organic compounds are in test tubes A‚ B‚ C and D. I am curious to know if substance D was the lipid because it seemed thin and had a slightly yellow tint of color to it. 3. Research: In my research I was informed about facts and appearances of lipids. First of all lipids are non-polar compounds‚ thus they won’t dissolve in water. This is also known as being hydrophobic. They are made with one
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of bacteria? Gram Stain This separation is based on differences in what physical trait? The separation is based on differences in the structure of the cell walls What is the iodine used for in this staining technique? The iodine in this staining technique is used after the crystal violet is applied. The iodine then affixes this and then a decolorizer is applied to take away the primary stain. Why is it important to heat fix the bacteria prior to the staining procedure? It is
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39. The Viscosity of Liquids After studying the present lecture‚ you will be able to Define viscosity and viscosity coefficient Outline the method to measure viscosity using Ostwald viscometer Determine the average molecular weight of a polymer Determine the surface concentration of 1-butanol in aqueous solution Measure the distribution coefficient of a solute betweenn two solvents 39.1 Introduction Viscosity‚ one of the transport properties‚ arises because of intermolecular attractive and
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Majed Al Dhwaihi Chem 151 Lab Prelab Assignment for week 3 Chemical Separation Procedure: Separating the sample: First place a small amount of the spinach provided in the mortar‚ just enough to cover its bottom; combined with the sand provided to break down the call walls. A 1:1 mixture of hexane and acetone was determined to best solvent for this extraction. Knowing this add one mL of the pure hexane and one mL of the pure acetone to the mortar. Grind the contents until the cell walls
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Placing fruit in a bag will help hasten the ripening for only a few fruits. Most fruits will not ripen (ever) once they have been picked. The only fruits that ripen once they’re picked are bananas‚ avocados‚ pears‚ mango‚ and kiwifruit. Ripeness in fruits is based on sugar content‚ not color‚ thus most tomatoes in grocery stores have no flavor because they were picked green and exposed to ethylene gas to induce color change. Tomatoes are what are known as a "climacteric fruit" which means they’ll
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Faculty of Science and Mathematics Universiti Pendidikan Sultan Idris LABORATORY REPORT SBF1013: GENERAL PHYSIOLOGY Semester 1 Session 2012/2013 LABORATORY 7b: Photosynthesis (Starch production during photosynthesis) PREPARED BY: EVA KHO JIUN TYNG E20111002619 YII YUANN CHI E20111002618 LIM SHIU MAN E20111002628 GAYTHIRI A/P SEENEE E20111002635 LAAVANYA A/P NYANASAIGRAN E20111002578 KAVITHIRAKASWIN A/P KUMARCHELVAN E20111002632 BAAVITHRA A/P GOPAL KISHNAM E20111002590
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(Author’s name) (Professor’s name) (Course details) (Date Abstract The aim of the lab was to separate and analyse analgesic drugs in a drug tablet. The method used to separate the components was Thin Layer Chromatography (TLC) with silica adsorbent as the stationary phase and 0.5% glacial acetic as the mobile phase. In one plate‚ five known samples were used as the reference‚ that is: Aspirin; Caffeine; Ibuprofen; and Salicylamide. Aspirin and Salicylamide were the only samples that fluoresced
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