The medium changes in color from purple to blue or dark blue. * Alkalinization F. The milk has changed from a liquid to a more solid consistency; clear‚ amber fluid is present in the upper portion of the tube above the solid material; a white ring of litmus has formed at the bottom of the tube‚ and litmus has formed a pink band at the surface of the clear liquid as well. * -Coagulation 65. Describe the physical change that occurs during lactose fermentation. Name one microbe
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Solubility‚ Crystallization and Melting Point Determination Post-Lab Discussion Guidelines: Part 2A and 2C: Draw tables (as in textbook) showing which combinations were soluble/miscible and which were insoluble/immiscible. Explain why this is so. Why are certain chemicals soluble/miscible when others are not? Part 3A: Calculate % recovery (this is not the same as % yield – see handout from the first day of lab if you’re confused)‚ and determine melting point of your product. Discuss % recovery
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and Purification of Solids- Part 2- Recrystallization Courtney Percival CH 337 Laboratory‚ Section 037 Department of Chemistry Portland State University‚ Portland OR ABSTRACT INTRODUCTION Recrystallization is a commonly used tool in laboratories when dealing with impure solids. "An effective recrystallization is one in which 1) a high degree of purity is achieved as well as 2) a maximum recovery of sample".1 Solubility‚ the tendency of a substance to dissolve in a liquid‚ is an important physical
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laboratory. Determine the volume‚ mass‚ and density of objects and liquids. Time Allocation: Allow 2 hours for this experiment Materials Materials Student provides Label or Box/Bag Qty 1 1 1 1 1 LabPaq provides Auxiliary Supplies BagCK1 © Hands On Labs‚ Inc. 1 1 1 1 1 1 1 1 1 1 1 LabPaq CK-1 Item Description Table salt Piece of string Isopropyl (rubbing) alcohol Tap water Paper‚ 5 cm x 5 cm for weighing chemicals Beaker‚ 100 mL‚ glass Cylinder‚ 25
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Without the exploration of the liquid fueled rocket Robert Goddard made in 1926 the world would be almost no where today in space travel. And without his exchange with the Smithsonian Institution the liquid fueled rocket might not have been a possibility. Robert Goddard was born October 5th‚ 1882 in Worcester Massachusetts. His mother was Fannie Hoyt and his father was Nahum Goddard. As a child Robert was not the best student he missed many days of school in high school. However‚ he was very successful
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Stoichiometry lab By: James Stewart Purpose: To calculate mole ratios Introduction: There are two types of chemical analysis; qualitative analysis which is the identification of a substance present in a material‚ and qualitative analysis which measures the amount of the substance. In this lab‚ you will perform a quantitative analysis of a two-step reaction. Copper(II) oxide will be synthesized from a known mass of copper(II) sulfate pentahydrate. Using the relationship of the balanced equation
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steps in the crystallization of an organic solid from a solvent and state the purpose of each operation. 1] dissolve solid product in minimum volume of hot solvent .. Purpose ... to get into solution 2] cool solution in a mixture of ice‚ water and salt. Purpose .. to enable pure product to crystallise‚ solubility decreases with temp‚ so cold. Impurities are present in small quantities‚ so do not saturate and are left in solution. 2a] if it all sets solid‚ you haven’t used enough solvent‚ so add a
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[pic] Recommendation Report EXECUTIVE SUMMARY This report investigate about a health product called Sebamed liquid face & body wash and Johnson’s pH 5.5 2 in 1 Body Wash with Moisturizers‚ which are aim to provide healthy skin to people. Moreover‚ it is recommended that the product could be sold in Mannings‚ because of the trend with chasing a quality and healthy life in Hong Kong. In this report‚ our information is mainly referenced by magazine‚ newspaper‚ our nutrition notes
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Which Liquid Dissolves Sugar Free LifeSavers Quickest? The purpose of my experiment is to find out which liquid‚(orange juice‚ water‚ Coca-Cola‚ or Sprite)‚ dissolves Sugar Free Life Savers the quickest.I think the Sprite will dissolve the Life Saver the quickest because it has the highest acidity‚ with ph levels reaching 2.4. The ph scale ranges from 0 to 14. Battery acid reaches 0 on the scale. 7 is considered neutral. Sprite has a ph level of 2.4. Coca-Cola has a ph level of 2.5. Orange juice
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Taylor Durham Nutrition 101 Mr. Oropallo Lab Report #2: Fat Extraction From Food What is a triglyceride? Draw its structure. A molecule that contains three fatty acids attached at the oxygen atoms of glycerol. What are the differences between saturated and unsaturated fats? Drawn an example of each. If all bonds are single‚ the fatty acid molecule is saturated. If there is a double bond among the carbon atoms‚ the fatty acid molecule is unsaturated. What form does each of these fats take at
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