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. Create a data table to record your data from the procedure. Be sure that the data table is neat and organized and that all measurements have the correct significant figures and units. (3 points) Table of Masses Empty Dish NaHCO HCl+NaCO3 Final (Dish and Salt Product 24.35 (grams) 10.06 (grams) 40.06 (grams) 31.52 (grams) 2. Write the complete balanced equation for the reaction that occurred in this lab. Hint: H2CO3 is not a final product of the double-replacement reaction; it breaks down
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Purpose=The purpose of this lab was to combine reactants‚ which we would pick ourself‚ to make 2 grams of Copper Phosphate and another product. Background: Chemistry is the branch of science that deals with the identification of the substances of which matter is composed. Chemistry has to do with many things we use today. For example‚ fireworks are made by the chemical combining magnesium‚ titanium‚ copper‚ aluminum‚ strontium‚ or other periodical elements. Things also like making plastic‚ jewelry
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ions Reagent/ Condition; Reaction | Explanation | Oxygen supply; Combustion | Limited supply of oxygen: CO formed.Even less Oxygen: C is deposited as soot. Excess Oxygen: Complete combustion (giving CO2 and H2O) | Al2 O3 and vaporisation of alkane at 500°C; Cracking of Alkanes | Al2 O3 is used as a catalyst. Heat provides energy for breakage of C-C bonds. | UV light; Initiation step of FRS of alkanes by halogens * Not required for electrophilic addition reaction btw Halogens and alkenes
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Abstract: A qualitative analysis experiment was conducted to determine the identity of an unknown aldehyde or ketone. The tests include a Tollens test‚ a Schiff test‚ an iodoform test‚ and a derivative melting point test. The data of the first three tests was inconclusive. The final derivative melting point test was utilized to successfully determine that the unknown was the ketone‚ Propiophenone. Introduction: Qualitative analysis is a method or series of methods used to determine the
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A. Objectives and background In an experiment‚ limiting reactant affect the “amount of the product.” In the other way‚ the product this reaction produce dependent on the limiting reactant. For example‚ 1000kg O2 and 1 gram H2 to form water. In this case‚ the 1 gram of H2 will be the limiting reactant. Same thing in displacement reactant. If one of the reactants is (Mole) less than the other one‚ then that reactants becomes the limiting reactants. Once the limiting reactants will completely be ran
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presence of lipids (fatty acids). The Benedict’s Test to identify the presence of reducing sugars. In the biuret test if the test result for protein changes a color of lavender‚ purple or pink‚ the test result for protein is positive using the Biuret reagent. In the iodine test If the Iodine turns black or blue-black there is starch present so the test result is positive. In the grease spot test if the test results leaves a translucent mark on the unglazed paper it is positive for the presence of lipids
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groups known as aldoses. Benedict’s reagent is used to determine if a reducing sugar is present. Benedict’s reagent is used as a test for the presence of all monossacharides and generally also reducing sugars. These include glucose‚ galactose‚ mannose‚ lactose and maltose. Even more generally‚ Benedict’s test will detect the presence of aldehydes (except aromatic ones) and alpha-hydroxyl-ketones‚ including those that occur in certain ketoses. Benedict’s reagent contains blue copper(II) ions (Cu2+)
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The calculations completed for this experiment include determining the amount of Na2CO3 needed to do a full reaction. This was calculated through stoichiometry calculations: Molar mass was first calculated for CaCl2*2H2O Ca = 40.078g Cl2 = 35.453g*2 = 70.906g 2H2 = 1.00794g*4 = 4.03176g 2O = 15.9994g*2 = 31.9988g 40.078g + 70.906g + 4.03176g + 31.9988g = 147.01456g or 147.0 g CaCl2 1g CaCl2 * 2H2O x (1 mol CaCl2 *2H2O/147g CaCl2 *2H2O) = 0.0068 mol of CaCl2*2H2O Molar mass was then
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Variable) | 1 Pipet‚ Graduated Jumbo (5 mL)(Dependent Variable) | 1 Distilled Water(Independent Variable) | 1 Potato(Independent Variable) | 2 Beaker‚ 50 mL Plastic(Dependent Variable) | 1 Test Tube(9)‚ 13 x 100 mm(Dependent Variable) | 1 Benedict’s Reagent - 15 mL in Dropper Bottle(Dependent Variable) | 1 Stove or Microwave(Independent Variable) | 1 Aluminum Foil 12 x 12 cm(Dependent Variable) | 1 Cylinder‚ 50 mL Plastic(Dependent Variable) | 1 Rod‚ Stirring rod – Glass(Dependent Variable) | 1 Sudan
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