SEMI – MICRO QUALITATIVE ANALYSIS OF SIMPLE INORGANIC SALT _______________________________________________________________ CATIONS: Pb2+ ‚Hg2+ ‚Cu2+ ‚Cd2+ ‚ Ag+ ‚ Fe2+ ‚ Fe3+ ‚ Al3+ ‚ Zn2+ ‚ Mn2+ ‚ Co2+ ‚ Sr2+ ‚ Ba2+ ‚ Mg2+ ‚ NH4+ ANIONS: CO32- ‚ S2- ‚ SO32- ‚ SO42- ‚ NO2- ‚ NO3- ‚ Cl- ‚ Br2- ‚ PO43- ‚ CH3COO- _______________________________________________________________ PRELIMINARY TESTS 1. Note the state (amorphous or crystalline) and colour of salt. 2. Test the solubility of the salt in
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ABSTRACTDuring my experiment‚ I have been investigating my research question: To what extent do white and brown eggshells differ in respect to percentage by mass of calcium carbonate content?Calcium carbonate is a substance found in the eggshells giving them hardness and strength. It is essential to the commercial egg industry that the biggest possible amount of eggs reaches the market. Hence‚ as calcium carbonate reacts steadily with hydrochloric acid to produce carbon dioxide as well as two other
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readily‚ and accurately‚ measured by the method originally developed by Winkler in 1888 (Ber. Deutsch Chem. Gos.‚ 21‚ 2843). Dissolved oxygen can also be determined with precision using oxygen sensitive electrodes; such electrodes require frequent standardization with waters containing known concentrations of oxygen. They are particularly useful in polluted waters where oxygen concentrations may be quite high. In addition‚ their sensitivity can be exploited in environments with rapidly-changing oxygen
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supplied marketed dosage form. Apparatus and reagents: Test tube Mortar pestle Dilute HCl Disodium hydrogen phosphate NH4OH AlCl3 NaOH Cobalt nitrate Ammonium carbonate Preparation of the sample: Ten of marketed products (tablets/ capsule) is taken and crushed in mortar pastle. This powder is used as a sample through out the experiment. Sample is taken‚ then dilute HCl is
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World Academy of Science‚ Engineering and Technology 72 2010 Preparation and Some Mechanical Properties of Composite Materials Made from Sawdust‚ Cassava Starch and Natural Rubber Latex Apusraporn Prompunjai*‚ Waranyou Sridach The performance and stability of sawdust-reinforced composite materials depends on the development of coherent interfacial bonding between sawdust and matrix. The general components of sawdust are cellulose‚ hemicellulose‚ lignin‚ pectin‚ waxes‚ and water-soluble substances
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Chlorine in Photosynthesis Experiment Abstract Photosynthesis the means by which green plants and different types of organisms use light from the sun to synthesize foods from CO2 and H2O. Chlorine is a chemical element usually in the form of a yellow-green gas and is a strong oxidizing agent. Elodea is a type of aquatic plant also known as waterweed that is native to North America. In the experiment that took place‚ the effect of chlorine in the presence of photosynthesis reactions were studied
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others‚ some will have more physical changes. I think they will all have at least some chemical and physical changes. ! ! Procedure: ! 1. Half-fill one well of a 24 - well plate with 6 M HCl and half-fill a second well of the 24-well plate with 6 M NaOH. Suck up the chemicals into their labeled pipets for later use. ! 2. Perform the following steps on each of substances being tested. Complete all the tests of one substance and record your observations before going o to the next. ! 3. Place 4 small
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also the formation of a precipitate. Materiel needed: Test tubes Rack of test tubes Plastic droppers Beakers Procedure: We prepare 7 beakers of 7 different solutions (that we mark from 1→ 7). We put separately around 50 ml of: HCl NaOH Na2CO3 K2CrO4 CaCl2 CuSO4 Unknown substance Using plastic droppers we mix 10 drops of one solution with 10 drops of another solution in a test tube‚ to get all in all 20 different test tubes. We then note the observation for each test tube.
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_____________________________________________________________________________________FACULTY OF APPLIED SCIENCE BACHELOR OF SCIENCE (HONS) BIOLOGY BIOLOGY DEPARTMENT BIO560 ASB3Cb EXPERIMENT 1: FUNDAMENTAL PHYSIOLOGICAL PRINCIPLES (ACID & BASES) STUDENT’S NAME MOHAMAD SYAMIL BIN MD. JANI 2013618492 LECTURER’S NAME: MDM DATE OF EXPERIMENT: 1 OCTOBER 2014 DATE OF SUBMIT: 8 OCTOBER 2013 INTRODUCTION: Physiology is a quantitative science that works on measuring changes
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bottom of flask Hair + HNO3 Turned hair slightly yellow Hair + bleach Partially dissolved Egg white + HNO3 Solidified the egg Egg white + NaOH Solidified the egg Egg white + bleach Completely dissolved Polystyrene + acetone Completely dissolved Aluminum foil + NaOH Clumped together to form a hard substance Egg yolk + HNO3 Solidified the egg Egg yolk + NaOH Solidified the egg Egg yolk + bleach Completely dissolved 3. What is the correct safety attire for this lab course? (6 pts) Students
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