Freezing Point Depression Purpose: The purpose of this lab is to demonstrate freezing point depression by dissolving salt into two liquids and monitoring temperature. Materials: test tube‚ Thermometer‚ 10 mL graduated cylinder‚ 2 micropipettes‚ Styrofoam cups‚ 4 pieces plastic wrap‚ 70% ethyl rubbing alcohol‚ 91% isopropyl rubbing alcohol‚ ice‚ distilled water‚ rock salt Procedure: Using the graduated cylinder‚ measure 2 mL of alcohol and pour it into the test tube. Add 10 mL of
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HIGH OIL PILFERAGE Rossly : Good point Rosmee. Well done. You have done a very good job. Rossly : So have you find any solution regarding high oil pilferage that we are facing right now? Any information about what I ask you to find last week? Rosmee : Yes sir. I have done a research for that. But before that‚ let me highlight once again about the problems. Currently‚ our tankers are missing and not arrived at the destination‚ our palm oils’ quality is compromised and because of our bad performance
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del Valle Department of Biological Sciences‚ College of Science‚ University of Santo Tomas‚ España‚ Manila‚ Philippines Abstract Caffeine was extracted from Lipton tea leaves by multiple extraction techniques namely solid to liquid extraction and liquid to liquid extraction; the purification by sublimation and melting point determination. Three teabags with weight 6.2674g were boiled with water and then extracted with 60 mL DCM; extract was dehydrated with anhydride Na2SO4 then was collected
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PORTFOLIO * Antiseptic Liquid * Hand Sanitizer * Medicated Plaster * Saving Cream with fresh fragrance * Body Wash * Soap – Original‚ Skincare‚ Cool‚ and Re- Energize * Liquid Handwash- Original‚ Skincare‚ Sensitive and Fresh * No Touch Handwash- Original and Cucumber PRODUCTS UNDER BRAND PRODUCTS UNDER BRAND APPROVED BY INDIAN MEADICAL ASSOCIATION ANTISEPTIC LIQUID DETTOL ANTISEPTIC LIQUID Dettol Antiseptic Liquid is a proven safe and effective
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HS130 MIDTERM REVIEW UNITS 1-4 Chapter 11 Blood Chapter 12 The Circulatory System Chapter 12 The Lymphatic System and Immunity Chapter 14 The Respiratory System Daudi K. Langat‚ PhD January 2011 Chapter 11 Blood BLOOD COMPOSITION Blood plasma • Definition—blood minus its cells • Composition—water containing many dissolved substances (e.g.‚ foods‚ salts‚ and hormones) • Amount of blood—varies with size and sex; 4 to 6 L about average;
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water into beaker and record 5. Add 5 more drops and record 6. Add 5 more drops and record 7. Repeat 1-5 two more times Part 2: Rate Order of KI 1. Get pipets and label them accordingly 2. Fill pipets with 2ml of each liquid 3. Put pipets on a stand 4. Get a well and clean it 5. Use table 1 as a guide and fill wells first well accordingly 6. Do the next 3 wells and repeat step 5 7. Fill wells 7‚8‚ and 9 8. Fill wells 10‚ 11‚ and 12 9. Add
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Which fluids have the highest density? The lowest? What does this tell us about which fluids will be on the top or bottom in the same container? Density is the comparison of the volume of an object to the matter. The fluid with the highest density is honey‚ while alcohol stands in the place of the lowest. The density of the fluids determines where each layer should be arranged in the glass container. Honey had a high density of 1.52g/mL‚ and with the high density comes high viscosity‚ which is why
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eutectic point of biphenyl. Unknown substances were then tested using the mixture melting point method in order to determine their identities. INTRODUCTION The melting point of a solid is the temperature where the substance changes from a solid to a liquid state. Using known substances and determining their melting points is a way to establish the purity of and to identify a sample. This lab demonstrates the temperature range where certain compositions of solid naphthalene and biphenyl begin to melt
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The unknown carboxylic acid’s melting point was 108°C according to the Mel-Temp machine. The melting point is the temperature at which a solid precipitate changes into its liquid form upon heating. The melting point of benzoic acid‚ the aromatic carboxylic acid was 122°C. Thus‚ the product contained impurities which caused the solid to melt at a lower temperature than the actual temperature. Pure solids typically melt at higher temperatures while impure solids melt at lower temperatures. This is
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Does Adding Salt to Water Make it Boil at a Higher Temperature? Project Design Plan Everyone knows that water boils at 212°F‚ but does adding salt to a pot of water make it boil at a higher temperature? Being a person that cooks frequently at home‚ I wanted to test the debated idea that adding salt to my water will make it boil faster. One of my friends says it does raise the temperature and therefore cooks it faster. My other friend says it only helps it taste better. Literature
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