52_100_Lecture_11_8_07

52_100_Lecture_11_8_07 - 11/8/2007 Recipe for Home-Made...

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11/8/2007 1 Recipe for Home-Made Biodiesel Ingredients: 1. Waste Vegetable Oil (WVO): used cooking oil, fryer grease, animal fats, and lard. 2. Methanol (CH 3 OH): 99 % + pure 3. Sodium Hydroxide (NaOH): must be dry 4. Isopropyl Alcohol [(CH 3 ) 2 CHOH]: 99 % + pure 5. Distilled Water 6. Phenolphthalein Solution Recipe for Home-Made Biodiesel Procedure 1. Filter WVO to remove any food scraps or solid particles. i. May need to be warmed to get WVO running freely, 95 o C 2. Removing the water (optional) i. Heat the oil to 100 o C with stirring to avoid splattering. 3. Titration i. To determine the correct amount of sodium hydroxide to be used
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11/8/2007 2 A Theoretical Aside Let’s take a look at the process known as titration. In addition we will need to introduce a few other fundamental ideas in chemistry 1. The mole 2. Molar Mass 3. Balanced Chemical Equations Titrations (Volumetric Analysis) In a titration , an accurately measured volume of solution of accurately known concentration ( titrant ) is added gradually to another solution of unknown concentration until the chemical reaction between the two solutions is complete. Equivalence point – the point at which the stoichiometric moles of each reagent is equal. Indicator – substance that changes color at (or near) the equivalence point Slowly add base to unknown acid UNTIL the indicator changes color
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11/8/2007 3 One Dozen eggs = 12 eggs A pair of sneakers = 2 sneakers The Mole The mole (mol) is the amount of a substance that contains as many elementary entities as there A case of beer = 24 beers are atoms in exactly 12.00 grams of 12 C Molar mass is the mass of 1 mole of in grams
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This note was uploaded on 04/03/2008 for the course CHEM 101 taught by Professor Hawrelak during the Fall '07 term at Bloomsburg.

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52_100_Lecture_11_8_07 - 11/8/2007 Recipe for Home-Made...

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