Laboratory Report Title: Identifying the four major classes of macromolecules through various tests. Group Members: Antonia Johnson‚ Payton Ewing‚ Lenneisha Hepburn‚ Kendisha Hanna‚ Introduction: Macromolecules also known as biological molecules are monomers which are the simple units of polymers. All macromolecules contain carbon and hydrogen which are found in organic compounds. In this Experiment we will test for the presence of protein‚ starch‚ lipids‚ and sugars by analyzing the content off food
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Summer Mitchell 10/04/13 Analysis and Conclusion 1. Why was the water tested for each of the initial chemical tests? The water was tested for each initial chemical test because it served as the controlled variable. Since water is pure oxygen and hydrogen unlike Glucose and Starch‚ one variable may be observed. 2. Biuret reagent will turn your skin brownish-purple. Explain why this occurs. Biuret reagent will turn your skin a brownish-purple because Iodine detects protein in a substance
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06/11 Water Absorption ASTM C 140 Water Absorption One of the most important properties of a good quality concrete is low permeability‚ especially one resistant to freezing and thawing. A concrete with low permeability resists ingress of water and is not as susceptible to freezing and thawing. Water enters pores in the cement paste and even in the aggregate. Absorption For concrete pavers‚ the test procedure involves drying a specimen to a constant weight‚ weighing it‚ immersing it in water for specified
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Chemical Gas Tests Procedure Part 1: Hydrogen and Manganese Dioxide 1. Inserted 4mL of hydrogen into a test tube 2. Scooped a little amount of manganese dioxide on the end of a wooden splint 3. Allowed the tip of the splint to flame using the Bunsen Burner 4. Allowed the reaction to proceed for a total of 15 seconds. 5. Placed the glowing splint into the test tube 6. Recorded the results Part 2: Magnesium strip and Hydrochloric acid 1. Poured 3mL of hydrochloric acid into a test
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CHEMICAL PARAMETERS OF FRESHWATERS Objectives At the end of this section‚ students should be able to 1. Distinguish between freshwaters and seawater in terms of ionic composition. 2. Describe the variation of ionic composition in natural freshwaters and other inland waters. 3. Explain the factors that contribute to such variation. 4. Describe Gibbs’ model that explains the major factors contributing to variation in chemical composition of inland waters. 5. Explain
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2.MATERIALS and METHODS 2.1. Nature of Reactants 2.1.1 We placed 3mL of 3 M HCl into each of 3 seperate test tubes. Next we added mossy zinc to the first test tubes‚ Sn granules to the second and Cu filings to the third and compared the rates of evolution of hydrogen gas in each test tube. 2.1.2. We mixed 3mL of 0.02 M KMnO4 and 2mL of 3 M H2SO4 in a test tube and stirred using a glass rod. Next‚ we divided the solution into two. We added 2mL of 0.03 M Na2C2O4 solution to the first half and
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Chemical T ests for Unknowns Chemical tests have been developed as a means of identifying what functional groups are present in an unknown compound. Since IR and NMR spectroscopy has been developed‚ they are no longer critical to unknown analysis‚ but they can still be useful for confirming what you have determined by spectroscopy. Some of them look cool too! In order for a chemical reaction to work as a chemical test‚ it must 1) create a visible result (a color change‚ a precipitate‚ etc)
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Designation: D2972 – 08 Standard Test Methods for Arsenic in Water1 This standard is issued under the fixed designation D2972; the number immediately following the designation indicates the year of original adoption or‚ in the case of revision‚ the year of last revision. A number in parentheses indicates the year of last reapproval. A superscript epsilon (´) indicates an editorial change since the last revision or reapproval. 1. Scope 1.1 These test methods2 cover the photometric and atomic
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Proud Parents of Lead Page 1 Name of element: Kobe Lead Nickname of element: (Pb) Birth Date: Ancient Times Birth Weight: 207.2 Race: Metal Attending Physician: Unknown Gender: Solid Place of Birth: Many different countries Personality: (melting- 600.61 K --- 327.46 C --- 621.43 F) (Boiling- 2022 K --- 1749 C --- 3180 F) Page 2 Pronunciation Rebus: lēd/ Page 4 # of protons: 82 # of neutrons: 125 # of electrons: 82 Atomic number: 82 Page 6 Family Name: Carbon Family Address:
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Chemical Water Quality Sarah Tilly Table of Contents 1. Introduction 2. Methods 3.1 Figures 3.2.1 Figure 1. Satellite Image from Google Maps of collection site in Stephenville City Park (Google‚ 2013). 3.2.2 Figure 2. Pictures I took of collection site taken on April 7th‚ 2013 3.2 Tables 3.3.3 Table 1. Quick reference guide—water-sample collection methods‚ preservation‚ storage‚ and handling. 3. Results 4.3 Tables 4.4.4
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