and the components identified Materials 1. Glass Slide 2. Needle and Lancet 3. Glacial Acetic Acid 4. 0.1 NaCl 5. Bunsen Burner 6. Microscope Procedure 1. Defibrinated blood was smeared on a glass slide to form a thin film. 2. The glass slide was passed over a moderate flame back and forth until the blood was quite dry. 3. Two drops of glacial acetic acid containing 0.1 N sodium chloride was then added to the film. 4. After placing a cover slip over
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Next set up the buret for the titration using the same method as week 1. Similar to week 1 the titration is performed using NaOH as a base in the solution so the buret should filled with the NaOH and the initial volume may be recorded. The acid (acetic acid) should be mixed in solution with 5.00 mL of acid and 50.0 mL of water. The water can be added in excess because the hydrogen that bonds with the OH to make water as a product is already present in vinegar and so it doesn’t bond with other water
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4/4/2013 Food Preservation Methods Food Preservation Using Chemicals SMY04032012 A naturally / synthetically produced substances that is added to food/beverages to prevent spoilage Preservatives: The good‚ bad and ugly! 1 4/4/2013 Sometimes‚ food may spoil because of the changes in the food itself. When food spoils‚ the following may change: • appearance • taste • texture • odour © Food – a fact of life 2007 Food may become unsafe to eat. Micro-organisms need certain
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a) 10.7 b) 17.3 c) 12.2 d) 15.8 e) 7.0 3. The Ka of acetic acid is 1.8 x 10-5. What is its pKa? a) 1.8 x 10-5 b) 5.18 c) 4.74 d) -4.74 4. What is the pH of a 0.100 M solution of acetic acid? a) 1.34 x 10-3 b) 2.87 c) 1.00 d) 4.74 e) 3.74 5. What is the acetate ion (Ac- or CH3COO-) concentration of the solution in Problem #4? a) exactly zero b) 3.74 M c) 0.100 M d) 1.34 x 10-3 M e) 1.8 x 10-6 M 6. What is the percent ionization of the acetic acid in Problem #4? a) 1.34% b) 0.134% c) 0.0014% d)
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n/V = 0.005/0.04025 = 0.124 M (3 sf) b) Volumetric pipette c) – rinsed with distilled water first to remove any impurities. Ensured all of the inner suface of the pipette was rinsed. – then rinsed with solution to be transferred i.e. acetic acid solution. – filled up the pipette (with the tip well into the solution) so that the bottom of the meniscus was sitting on the calibration mark. – transferred solution into conical flask‚ resting the tip on the inner neck of the flask
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Question: What is the molar concentration of acetic acid in a sample of vinegar? Prediction: The manufacture of claims on the label that the vinegar contains 5.0% acetic acid‚ which translates into a 0.87 mol/L concentration of acetic acid. The concentration of acetic acid in the vinegar sample should be the same. Purpose: If we add acid solution to basic solution to produce water and salt this activity is called titration. It involves carefully adding one solution to another until chemically
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|wear eye protection | | | |Goggles can be worn to protect the eyes‚ lab coats can be worn to | |Ethanoic anhydride |Harmful |protect clothing and gloves can be worn to prevent touching of the | | | |liquid.
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Abstract The purpose of this experiment is to synthesize isopentyl acetate via an esterification reaction between glacial acetic acid and isopentyl alcohol‚ using concentrated sulfuric acid as a catalyst. The product was washed using sodium bicarbonate and water‚ then dried with anhydrous sodium sulfate. It was then distilled using a standard simple distillation apparatus. The percent yield of isopentyl acetate was 60.39%. This may have been low due to incomplete distillation or evaporation once
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Pineapple Peelings as Vinegar TABLE OF CONTENTS Title Page Abstract…………………………………………………………... 1 Research Plan……………………………………………………..2 Introduction…………………………………………………..2 Statement of the Problem……………………………………..2 Significance of the Study……………………………………..2 Scope‚Delimitation and Limitations…………………………..2 Definition of Terms……………………………………………3 Review of Related Literature………………………………………4 Methodology………………………………………………………5 Materials……………………………………………………….5 Procedures……………………………………………………
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Experiment 1: Neutralization of Acids and Bases In this experiment‚ you will learn how to properly neutralize and dispose of acidic and basic solutions. Materials 5 mL 4.5% Acetic Acid (vinegar)‚ C2H4O2 (1) 10 mL Graduated Cylinder 8 Litmus Test Strips (Neutral) Permanent Marker 2 Pipettes 1 g Sodium Bicarbonate (baking soda)‚ NaHCO3 4 Weigh Boats *Water *You Must Provide Procedure 1. Use the permanent marker to label three of the weigh boats as A - C. 2. Measure and pour approximately
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