be tested for using the ordinary reducing sugar test. A positive result therefore means non-reducing sugars are present on the original sample. Starch is easily detected in substances by its ability to change the colour of the iodine in potassium iodide solution from yellow to blue-black. Lipids do not dissolve in water‚ but do dissolve in ethanol. This
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seven of the E wells. 2. When performing the following‚ NEVER TOUCH THE TIP OF THE PIPET TO THE SOLUTION ALREADY IN THE WELL! a. Place 2 drops of sodium phosphate solution into five vertical wells under column number 1. b. Place 2 drops of sodium iodide solution into five vertical wells under 2. c. Place 2 drops of sodium sulfate solution into five vertical wells under 3. d. Place 2 drops of sodium chloride solution into five vertical wells under 4. e. Place 2 drops of sodium bicarbonate solution
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LESSON PLAN FOR III-PEARL (CHEMISTRY) FORMULA WRITING AND NAMING OF COMPOUNDS OBJECTIVES: (1) Classify ions according to their composition‚ charge‚ and oxidation number (2) Define chemical formula (3) Explain the importance of representing ions‚ elements and compounds using chemical formulas (4) Write and name chemical formulas of compounds using the Stock System and Classical System MATERIALS: power point presentation videos flashcards textbook
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value of n for OH-? Explain your answers briefly. 2.) Determine the NaOH titer for phosphoric acid if the phosphoric acid solution is at 0.1 N. 3.) A 0.6334-g sample of impure mercury(II) oxide was dissolved in an unmeasured excess of potassium iodide. Reaction: HgO(s) + 4I- + H2O [HgI4]2- + 2OH- Calculate the percentage of HgO in the sample if titration of the liberated hydroxide required 42.59 mL of 0. 1178 M HCl. 4.) The active ingredient in Antabuse‚ a drug used for the treatment of
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UNIVERSITI MALAYSIA SABAH SCHOOL OF FOOD SCIENCE & NUTRITION LABORATORY REPORT NT20903 FOOD CHEMISTRY AND BIOCHEMISTRY Determination of free fatty acid(FFA) and iodine value (IV)in oil LECTURER NAME : MOHD NAZRI BIN ABDUL RAHMAN LAB SESSION : 3 OCTOBER 2011 (GROUP 4‚ MONDAY) Group Member Title: Determination of free fatty acid (FFA) in oil and determination of iodine value (IV) in oil Introduction Acid value or free fatty acid content is an important characteristic commonly
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Well Chemical #1 ( 4 drops) Chemical # 2 (4 Drops) Observations Chemical Change (Y/N) A1 NaHCO3 SodiumBicarbonate HCl Hydrochloric Acid Bubbles yes A2 NaOCl Sodium-Hypochlrite Kl Potassium Iodide Observation 1: None Add 2 drops of solution Observation 2: Solution turned blue Yes A3 Kl Potassium Iodide Pb(NO3)2 Lead Nitrate Turned Yellow Yes A4 NaOH Sodium Hydroxide C20H14O4 Phenolphthalein Turned pinkish red (magenta) Yes A5 HCl Sodium Hydroxide C20 H14 O4 Phenolphthalein Turned Cloudy Yes
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Throughout the reaction‚ it was important to test for the presence of NaOCl. Its presence in excess is vital to the ability of the reaction to take place as it is the source of the two needed reagents‚ namely OH- and Cl2. To test for its presence‚ starch iodide paper is inserted in the reaction flask and if sodium hypochloride
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ntroduction: Cells have kinetic energy. This causes the molecules of the cell to move around and bump into each other. Diffusion is one result of this molecular movement. Diffusion is the random movement of molecules from an area of higher concentration to areas of lower concentration. Osmosis is a special kind of diffusion where water moves through a selectively permeable membrane (a membrane that only allows certain molecules to diffuse though). Diffusion or osmosis occurs until dynamic
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map: grams ( mols( atoms 20.0 g Ca x 1 mol Ca x 6.02 x 1023 atoms Ca 1 40.01 g Ca 1 mol Ca atoms 3. What is the mass of 6.20 moles of potassium iodide? Mol( grams 4. How many moles are contained in 84.2g of potassium sulfate? 5. Calculate the number of molecules in 3.34 moles of carbon dioxide. 6. What is the mass of 3.01 x 1023 atoms of sulfur? 7. What
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