Purpose: To use indicators to test for the presence of organic compounds in certain substances. Hypothesis: Honey will contain sugars‚ egg white contains proteins‚ corn oil contains lipids‚ oats contains starches and proteins‚ gelatin contains sugars and proteins‚ potatoes contain starch‚ and apple juice contains lipids and sugars. Materials: 9 test tubes Test tube rack Test tube holder Grease pencil Hot plate 20 ml honey solution 20 ml egg white and water mixture 20
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Specific Objective: Carry out test for reducing sugar‚ non reducing sugar‚ starch ‚ protein and lipid. BIOCHEMICAL TESTS Reducing and non-Reducing Sugars Sugars can be classified as either reducing or non-reducing based on their ability to reduce copper(II) ions to copper (I) ions during the Benedict’s Test. Reducing sugar have contain free aldehyde or ketone group and have the ability to reduce copper(II) ions to copper (I) ions during the Benedict’s Test. All monosaccharides are reducing
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1. Why do different metals have different characteristic flame test colours? The photons emitted during the test precisely match the quantum energy difference between the excited state and the ground state. For different elements the spacing between the ground state and the higher energy levels is different. So different elements have different flame test colours. 2. Most salts contain a metal and a non-metal. Look at the compounds we tested and determine whether it is the metal or the non-metal
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cation and anion analysis is that in anion analysis‚ a series of separations of the ions from one another is usually not the most efficient way to determine their presence. Instead‚ only some separations will be made‚ and the initial test solution will be used to test many of the ions. Refer to the flow chart at the end of the experimental directions as you proceed. First you will prepare and analyze a “known” solution which contains all six of the anions. Then you will analyze an “unknown” solution
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PREPOSITIONS WHAT ARE PREPOSITIONS? Prepositions are words that demonstrate association between a noun or pronoun and another word‚ that is‚ to show how they are joined with some other word in a sentence. Examples: 1. The book is on the bed. 2. The book is under the bed. The various prepositions‚ on and under‚ used before the noun bed show the different positions of the book with regard to the bed. It shows the relation between the book and the bed. This is the function of Preposition
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Analysis of Alum‚ AlK(SO₄)₂ •12H₂O Purpose The purpose of the experiment is to confirm whether the compound is Alum. Introduction Percent composition is defined as part divided by whole multiplied by 100. Water of hydrogen is defined as the amount of water produced into a molecule prepared in an aqueous solution. Molecular formula indicates the actual numbers and type of atoms in a molecule (notes). Procedure The procedure in this experiment is to determine melting point and mole ratio of
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Biruiet Test: Procedure Instead of the Biuret Reagent‚ the following may be used: * Fehling’s Solutions A and B * Sodium hydroxide and copper (II) sulphate solutions 1. Add 2 cm3 of the liquid food sample* to a clean‚ dry test tube 2. Add 2 cm3 of Biuret Reagent. Alternatively: * Use sodium hydroxide solution and copper sulphate solution instead. Add 1 cm3 of sodium hydroxide solution (40% or bench solution) and 1% copper (II) sulphate solution dropwise – drop by drop - to
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Eureka! Test A proposal presented to the faculty of software technology Datamex College of Saint Adeline Pasig City In partial fulfillment Of the requirements in the subject “Software Project” Presented To: Mr. Mark Bryan O. Mercado Presented By: Anna Bien Suriaga Angela Soriano Johnvie Tolentino Date of Submission: January 12 2011 Chapter I. Introduction Intelligence quotient (I.Q.) A numerical quotient obtained by multiplying the mental age of a person and dividing
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Efficient risk bearing hints that it is better to give employees fixed salaries‚ while incentive considerations lead to the conclusion that it is better to tie pay to performance. (Brickley‚ Smith‚ and Zimmerman‚ 2009). Thus a well-designed compensation plan should be able to reflect the trade-offs between these two. Employees typically are risk-aversion. They do not have full control over their outputs. In addition to employee efforts‚ the overall performance of the company greatly depends on random
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In the story “A Rose for Emily‚” Faulkner uses characterization to portray Emily’s mental decline throughout her life. By being kept away from the real world by her father‚ to being free to venture out after his death to having to keep a murder a secret. Faulkner best characterized Miss Emily as snobby‚ crazy and secretive. Emily is kept away from outside society early in her life because her dad believes no one was good enough for her. As Faulkner stated on (page.311) “people in our town believed
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