June 26‚ 201 ------------------------------------------------- Abstract In this experiment‚ different statistical concepts; such as Q-test‚ Mean‚ Standard Deviation‚ Range‚ and Confidence interval were used to determine the weight variations in samples. Mass of ten 25-centavo coins was determined using analytical balance‚ treating each as single samples. The values were then divided into two data sets. From this experiment‚ it can be seen that the values from each data set do not vary greatly from each
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Unit 2 PPA 1 Complexometric Determination of Nickel using EDTA Introduction: The Aim of the experiment is to determine the percentage of nickel salt using a complexometric technique. Ethylenediaminetetraacetic acid (EDTA) is a hexadentate ligand which forms stable complexes with most metal ions‚ thus is widely used to determine metals in complexometric titrations. EDTA can be represented as H4Y and in alkaline conditions‚ it exists as Y+ ions: The Y4- ions form 1:1 complexes with metal ions
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case osmosis will cause more water to move out of the cell than will move in the cell and the cell will shrink. In this case‚ we say that the solution is “hypertonic”. Learn more about osmosis and diffusion from Chapter 3 of your textbook. CELERY EXPERIMENT We can place celery in three different water solutions to observe the effects of osmosis on the celery stalks. Salt will serve as our solute to
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Chapter 5: Solutions‚ Colloids‚ and Membranes Chapter Summary Mixtures and Solutions * A mixture maintains its identity regardless of the proportions of its components. * A mixture can be separated into its pure components through physical separation techniques. * The components are distributed uniformly throughout a homogenous mixture. * The components are not distributed uniformly throughout a heterogeneous mixture. * A solution is composed of a solvent and one or more solutes
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GENERAL ARTICLE CHILE: An Evidence-Based Preschool Intervention for Obesity Prevention in Head Start SALLY M. DAVIS‚ PhDa SARAH G. SANDERS‚ RN‚ MSb COURTNEY A. FITZGERALD‚ MSSW‚ LMSWc PATRICIA C. KEANE‚ MS‚ RD‚ LDd GLENDA F. CANACA‚ MDe RENEE VOLKER-RECTOR‚ BAf ABSTRACT BACKGROUND: Obesity is a major concern among American Indians and Hispanics. The Child Health Initiative for Lifelong Eating and Exercise (CHILE) is an evidence-based intervention to prevent obesity in children enrolled
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M10/4/CHEMI/HP2/ENG/TZ1/XX/M+ MARKSCHEME May 2010 CHEMISTRY Higher Level Paper 2 18 pages –2– M10/4/CHEMI/HP2/ENG/TZ1/XX/M+ This markscheme is confidential and for the exclusive use of examiners in this examination session. It is the property of the International Baccalaureate and must not be reproduced or distributed to any other person without the authorization of IB Cardiff. –5– Subject Details: M10/4/CHEMI/HP2/ENG/TZ1/XX/M+ Chemistry HL Paper 2 Markscheme
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DISCUSSION NO. 3 THE PERIODIC TABLE OF ELEMENTS Members: Salvador‚ Kim Kristal G. Sanchez‚ Jhoana Marie V. Santeco‚ Francesca Anya C. Sy‚ Shane Francheska Lei Dayanne S. Ureta‚ Nheimelyn E. INUR-7 GROUP 10 HISTORY OF THE PERIODIC TABLE The discoveries of elements stole a long period of time. As a matter of fact‚ several elements were mentioned in Biblical accounts and Koran. However‚ it was in the 19th century where they get to discover a lot of element. And as the number of
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Post Lab Report Experiment 3 - Chromatography – Analyzing Analgesics by TLC and Isolation of β–Carotene by Column Chromatography Chemicals 1. Acetaminophen (C8H9NO2) 2. Aspirin (C9H8O4) 3. Caffeine (C8H10N4O2) 4. Ibuprofen (C13hH18O2) Introduction In this experiment‚ several analgesics were analyzed by Thin Layer Chromatography (TLC) and the composition of an unknown tablet was identified. We define chromatography as the separation of two or more compounds or ions by
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The Effects of Environmental Stimuli on Animal Behavior AP Biology Emily Olsen April 26‚ 2012 I. Introduction: The purpose of this lab is to test the effect certain stimuli has on the behavior of a terrestrial isopod. These bugs are more commonly known as pill bugs and potato bugs. The objective of this experiment is to determine which kinds of habitats potato bugs favor. Potato bugs have an innate behavior called taxis which will cause the animal to move away from a stimulus that is unwanted
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