Cell Membrane Transport The purposes for these experiments is to be able to understand osmosis and its relationship to tonicity of solutions‚ and the transportation of molecules across cell membranes. It’s also used to understand‚ and how temperature affects diffusion. You also learn how to test for presences of starches and sugars in solutions. In the first exercise I will be testing for diffusion through an artificial membranes. This one has forty five steps to it. I will not go into
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salt compound being applied to the driveway is made up of in order to get a clear picture of how it may be affecting the grass growth. Salt is sodium chloride that occurs naturally on earth as mineral halite. When mineral halite evaporates‚ it turns into salt lakes. The chemical compound is NaCl with 60.663% elemental chlorine (Cl) and 39.337% sodium (Na). Salt crystals are cubic in form and can be modified by temperature. Salt that is commonly used for deicing is rock salt also known as halite
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the plants would die and people and animals would go thirsty. What is water? Water is made up of two hydrogen atoms‚ and one oxygen atom. When these atoms come together‚ they form a strong bond that can’t be broken. What is Table salt? Sodium chloride Designed for cooking Has many ingredients 1. Potassium iodine- stabilizer 2. Glucose (sugar) - prevent the potassium iodine from breaking down. 3. Calcium silicate- anti-caking additive What at Sea
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Chemical Reactions I. Purpose – The purpose of this lab was to observe different type of chemical reactions to write and balance chemical equations. II. Hypothesis: If you mix two chemicals together‚ then they will change color and/or bubble/fix. III. Procedure - Workstation 1: 1. Light the Bunsen Burner 2. Add 5 – 8 mL of HCL to a test tube that’s in the test tube rack 3. Drop a 2 – cm piece of Mg ribbon into the test tube 4. Record Observations 5. Clean Workstation
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precipitate reaction happens when cations and anions of certain aqueous solutions react and combine forming a precipitate‚ which is an insoluble ionic solid. In this precipitate reaction we dissolved both chosen chemicals (powder Calcium Chloride dihydrate and powder Sodium Carbonate) in distilled water and then mixed them together in a single beaker. Finally we filtered this mixture and let all the water evaporate leaving behind solely the precipitate. In order to determine the amounts needed of each
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Colourless gas with a smell of rotten eggs (H2S); turns lead acetate paper black 1. Sodium nitroprusside test: WE + sodium nitroprusside 4 = purple / violet colour 2. Lead acetate test: WE + lead acetate 5 (aq) = black ppt 5. Nitrite: Pungent light brown gas 1. Starch-iodide test: WE + dil H2SO4 (or dil acetic acid); boil‚ then add solid KI + fresh starch sol = deep blue colouration Group II (conc H2SO4 group) – Cl(chloride)‚ Br- (bromide)‚ I- (iodide)‚ NO3- (nitrate)‚ CH3COO- (acetate)‚ C2O42(oxalate):
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Report Introduction Mummification is an ancient Egyptian method which is a natural or deliberate process intended to dehydrate the body to preserve it. They done this because they believed that if a body was left to rot then it would destroy their soul‚ so they believed that the body needed to be intact to serve as host for the soul. So they preserved bodies so they could use them in the afterlife‚ where the Egyptians believed they would make a journey to another life. To start to mummify a body
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the separation of calcium carbonate from the mixture. In the second reaction we use the product of the first reaction (CaCl2) and change it back to calcium carbonate (CaCO3) by mixing CaCl2 with potassium chloride (2KCl). Objective To separate the components of mixture of sand‚ sodium chloride and calcium carbonate. Materials and Equipment 1. Two beakers 2. Experimental mixtures 3. Distilled water 4. Funnel 5. Filter paper 6. Evaporating dish 7. Buchner funnel 8. Weighing machine 9. Conical flask
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uranium (U)‚ sodium (Na) and a metal of your choosing. USE THE FOLLOWING DATA: YOU DO NOT NEED TO GO INTO THE VIRTUAL LAB! Part 1 Gold (Au) 51.0616 grams Lead (Pb) 33.1230 grams Uraniun (U) 51.0581 grams Sodium (Na) 2.8699 grams Your choice - Nickel (Ni) 24.0461 grams Part 2 NaCl 1.0483 grams C12H22O11 1.0280 grams NH4Cl 0.9963 grams C6H5OH 1.0362 grams your choice Ca(OH)2 0.9765 grams Part 2‚ Measuring Compounds 1. Click on the Stockroom. Double-click on sodium chloride (NaCl) on the
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CUP OF LAVA Camille Sager Darielle Donato Eric Valerio I. Introduction Salt‚ also known as common salt‚ table salt‚ rock salt‚ or halite‚ is an ionic compound with the formula NaCl (sodium+chloride). Sodium chloride is the salt most responsible for the salinity of the ocean and of the extracellular fluid of many multicellular organisms. As the major ingredient in edible salt‚ it is commonly used as a condiment and food preservative. Because of its importance to survival‚ salt has often
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