Unknown sample number #1 #2 #3 #4 #5 #6 Hypothesis: Coffee Potting soil Raw sugar Baby powder Baking soda Baking powder Color: Brown Gray‚ brown‚ Tan White White White Texture: Course inconsistent Course Soft soft Soft Shape: Small granular pieces Granular particles‚ twig like particles granular-like particles Powder-like Powder-like Powder-like Smell: Of coffee no Of sugar Of baby powder Non No Soluble: Yes no yes yes yes yes Density: 0.307 0
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Cogswell ENG2D- 02 October 15‚ 11 Fear of the Unknown People are quick to judge‚ fear and hate the unknown. Some people may not admit it but everyone is plagued with the tendency to let our imagination take over reality and turn it into the unknown. An excellent example of this is in William Golding’s novel Lord of the Flies. All the boys in Golding’s novel are totally indulged in the theme of fear of the unknown. All of these have some “unknown” element to them; they can’t see in the dark‚ they
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Staphylococcus epidermis (gram positive) bacteria for 24 hours (in an incubator)‚ garlic will have the strongest antimicrobial effect. This is because of allicin (an active principle of garlic homogenates)‚ which has a chemical reaction with thiol groups of enzymes in the bacteria. Ginger will have the least antimicrobial effect. This is because there are not as many chemical reactions with enzymes in the bacteria. Risks: The risks of using Staphylococcus epidermis bacteria to test in microbiology are few
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TITLE : * Analysis of an unknown acetic acid solution OBJECTIVES : * To prepare the sodium hydroxide solution‚ NaOH * To standardise the base against potassium hydrogen phthalate * To analyse the unknown acetic acid RESULTS : A. Preparation of the sodium hydroxide solution Volume of NaOH taken from the stock solution = 3.33 mL B. Standardisation of the base against potassium hydrogen phthalate | 1 | 2 | 3 | Weight KHP | 1.0000 | 1.0004 | 1.0006 | Final volume
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LAB Report #3 Introduction: In this lab we have focus on Isolation of bacteria from environment. Microorganisms are found throughout the environment: in the air and water; on the surface of any object such as clothes‚ walls‚ furniture; in soil and dust; and on and in our own bodies (skin and mucous membranes). In order to demonstrate the ubiquity and diversity of microbes in the environment‚ samples from immediate areas of the environment and/or from your body will be obtained and cultured
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Lab Report 2: Quantitative Analysis Finding the Percentage Composition of Nickel in an Unknown Compound Introduction: This section of lab was about using analytical chemistry and learning how to identify the amount of nickel in an unknown substance. The purpose was to use gravimetric analysis to quantitatively separate and weigh insoluble reaction products as well as utilize the mole method to compute the amount and percentage of nickel in an unknown nickel sample. The chemical reaction that took
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The poem the unknown citizen written by w.h Auden portrays from the point of view of the government what or how an ideal citizen should look like. This piece is written in third person omniscient to project a non-bias perspective and that way transmit the “truth” without being affected by feelings or personal point of views. Moreover at the end of the poem the author makes a relevant turn which effect is making the reader question himself if what was depicted before is the right thing‚ if that ideal
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we know that we know. There are known unknowns. That is to say there are things that we now know we don’t know. But there are also unknown unknowns. There are things we do not know we don’t know. So when we do the best we can and we pull all this information together‚ and we then say well that’s basically what we see as the situation‚ that is really only the known knowns and the known unknowns. And each year‚ we discover a few more of those unknown unknowns.” I would have told you that I thought
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Introduction The purpose of this lab was to identify unknown bacteria cultures using various differential tests‚ and my unknown bacteria is #17. The identification of these unknown cultures was accomplished by separating and differentiating possible bacteria based on specific biochemical characteristics. Whether the tests performed identified specific enzymatic reactions or metabolic pathways‚ each was used in a way to help recognize those specifics and identify the unknown cultures. The differential tests
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involves two oxidation-reduction reactions to calculate the oxidizing capacity of a sample of unknown bleach. In order to determine the volume of Na2S2O3 added‚ students will conduct a titration of bleach with thiosulfate with addition of a starch indicator to find the end point of the titration. Moreover‚ the oxidizing capacity of bleach is calculated with the percentage by mass of NaOCl in the unknown bleach sample. The overall chemical reaction throughout the experiment will be balanced with the
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