...Onion Extract as pH/ Acid-Base Indicator _______________ A Science Investigatory Project Presented to Mrs. Shellah Marie Tabayoyong-Cruz Marist School, Marikina City _______________ In Partial Fulfillment of the Requirements for the Course Science & Technology 9 _______________ Presented by TAGAÑA, Kurt Lance C. CORDOVA, Chedric Joshua L. CONCEPCION, Ludwig Michael T. 9-St. Titus March 2014 ACKNOWLEDGEMENT The researchers of this study would like to thank Mrs. Gay Fan for sharing her advices and ideas about chemistry. Truly, without her help, this study wouldn’t be made. They would also want to acknowledge the help of Mrs. Aurora Ramos by letting them borrow a pH wheel with pH papers in it. Last, but not the least, they would want to thank Mrs. Shellah Marie Cruz for her efforts in checking, criticizing, and helping the researchers for the good of their study. TABLE OF CONTENTS Abstract 3 Chapter I: Introduction 4 Chapter II: Review of Related Literature 7 Chapter III: Methodology 9 Chapter IV: Presentation, Analysis and Interpretation 11 Chapter V: Generalization 12 Chapter VI: Recommendation 13 Bibliography 14 ABSTRACT The study aims to provide chemists a source of an accurate acid-base/ pH indicator which is abundant and can be found anywhere in order to help them in certain laboratory situations such as identifying whether a solution is an acid or base. Red onion extract...
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...Andreas Sippl Student ID: 4445491 Date: 04 January 4, 2015 Course and Section Number: SCIN131 Lesson 6 Lab: Titrations and Natural Acid/Base Indicators Begin by viewing the following Thinkwell videos 15.1.7 CIA Demonstration: Titrations 11.2.2 CIA Demonstration: Natural Acid-Base Indicators (NOTE: The second video is sort of a supplement to the first, and shows how this applies to your daily life. Feel free to try some of the things listed in the video, but be sure to report back to the class regarding the results of your experiments!) After you watch the above video, answer the questions below in sufficient detail: (a) (1 pts.) In YOUR OWN WORDS, what is a titration? What type of reaction is it? Be detailed and specific...
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...the Requirements in Research II Researchers Verchiel B. Cubelo Ma. Rena N. Catoltol Nathaniel L. Perol S.Y. 2014-2015 CHAPTER I INTRODUCTION Nature and Importance of the Study Fire is a reaction involving fuel and oxygen that produces heat and light. Humans use fire to warm themselves and to cook food, and to start a fire, we commonly use lighters and matches, unlike the early humans who rub sticks or rocks. Today, people naturally focus not on starting fire but on using it productively and on preventing or extinguishing unwanted fires using fire extinguishers. These are portable devices used to put out fires of limited size. Such fires are limited into four classes, according to the type of material that is burning. Class A fires include those in which ordinary combustibles such as wood, cloth, and paper are burning. Class B fires are those in which flammable liquids, oils, and grease are burning. Class C fires are those involving live electrical equipment. Class D fires involve combustible metals such as magnesium, potassium and sodium. Each class of fire requires its own type of fire extinguisher. This study focuses on the use of common salt (sodium chloride), baking soda (sodium bicarbonate), and vinegar (acetic acid) as fire extinguisher. Vinegar is a liquid consisting mainly of acetic acid (CH3COOH) and water (H2O). The acetic acid is produced by the fermentation of ethanol by acetic acid bacteria. Baking soda, a base, is an amphoteric compound...
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...that is considering having genetic screening? Week 2: Question 1= Choose an FDA-approved prescription medication and discuss the pharmacokinetics and pharmacodynamics of the medication, including any differences that would be expected based on the patient's age, a condition of pregnancy, or lactation. Address any adverse effects the medication may have based on age, pregnancy, or lactation. Question 2= Active acquired immunity can be achieved through the use of childhood immunizations. Many parents voice concerns regarding the safety of vaccinations. What is your opinion on the current use of vaccinations? How would you educate parents regarding the safety and effectiveness of vaccinations? Defend your answers with evidence-based research. Week 3: Question 1= Share a case study of an electrolyte imbalance from your practice or from the...
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...Lab #1 “Who has the same solid that I have?” Abstract Different Physical and chemical tests were performed on 10 numbered unknown solids and the results of all tests were compared as a class to try and determine which groups had the same unknown solids based on similarities in properties. It was found that my given unknown solid #11 shared similar properties with the unknown solid #1. A side by side analysis of the reactivity test in which Hydrochloric acid (HCI), lead nitrate (Pb(NO3)2) and sodium hydroxide (NaOH) was added to three separate samples of the compounds unknown #1 and #11 aqueous solutions. The results for both unknowns were identical, leading to the conclusion that my unknown solid #11 was the same unknown solid as #1. Introduction When conducting research it is important to be comfortable communicating your results with other researchers so that they can be further analyzed and compared with the results of other research experiments. Another large part of conducting research is to be comfortable determining, describing and comparing chemical and physical properties of compounds. Many compounds can look very similar, but have drastically different chemical properties, so it is important to know which tests can be performed on a compound to help determine what it is, or what it is not. In this experiment 2 sets of six unknown solid compounds were put into small jars and labeled with the numbers 1-12, numbers 4, 6 and 8 were not used. Each lab group was given...
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...drawn to the comments made in the Course Handbook with regard to both the completion and submission of work * Assessment deadlines must be met * Any student found guilty of cheating or plagiarism may be withdrawn from the unit at the discretion of the Assessment Board. | Internal verification: | Date: | | Name | | | | Signature | | Aim and purpose:-To develop understanding of the principles of Mendelian genetics and to develop knowledge and practical techniques used in commercial, analytical and research laboratories | | GRADING CRITERIA To achieve a pass grade the evidence must show that the learner is able to: | To achieve a Merit grade the evidence must show that the learner is able to: | To achieve a distinction grade the evidence must show that the learner is able to: | P1 Compare and contrast the structure of various nucleic acids. | M1 Explain how genetic information can be stored in a sequence of nitrogenous bases in DNA. | D1 Explain the steps involved in biosynthesis of protein including the roles of...
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... * Roll up sleeves and/or do not wear baggy or loose clothing. * If any glass is broken, do not pick it up with bare hands. * Sweep the glass into a dustpan and place in broken glass bucket. * Be careful when pouring acid or base. * If any is spilled on hands, wash thoroughly with soap and water. Materials * * Safety glasses * Tap water * Masking tape * Precision scale * Pen/pencil & paper * Egg * Buret * Buret clamp * Retort stand * 3 Erlenmeyer flasks * 10 mL graduated cylinder * Wash bottle * Distilled water * 3 Beakers * 250 mL beaker for base * 100 mL beaker for acid * 500 mL beaker for waste * Ethanol * Phenolphthalein * Sodium Hydroxide (NaOH) * Hydrochloric Acid (HCl) * Hot plate * Hot hands * Scoopula * Break the egg, and get rid of the yolk and egg whites into a large beaker. Break the egg, and get rid of the yolk and egg whites into a large beaker. Wash the shell with tap water and peel off the membranes with your fingers. Wash the shell with tap water and peel off the membranes with your fingers. Pat dry with paper towel and allow the shells to dry for a few days. Pat dry with paper towel and allow the shells to dry for a few days. Crush the shells to a fine powder with a mortar and pestle. Crush the shells to a fine powder with a mortar and pestle. Procedure—Prelab Procedure—Prelab Weigh between 0.450g and...
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...Acid Reflux: New ways to treat an old issue Stacy C. Darracott NS304 Professor Linda Flowers Park University For my position paper I plan to discuss the several techniques used in treating acid reflux. Since the majority of the population suffers from some form of Acid Reflux, myself included, I thought that this would be a great opportunity to do some research on the different treatments, and find out exactly why and what causes it. My paper will take a closer look at the non-pharmaceutical approaches that are surgical in nature or homeopathic in nature. Lastly, my paper will not only help the reader to understand what acid reflux is exactly, but will help to inform them as well as myself, to the every changing techniques and practices of physicians who are trying to help those who suffer from acid reflux, a better a ray of choices when discussing their treatment plans. Gastro esophageal reflux disease is a consequence of the failure of the normal anti reflux barrier to protect against frequent and abnormal amounts of gastro esophageal reflux. It is the gastric contents moving effortlessly from the stomach to the esophagus. It is a normal physiologic process that occurs multiple times each day especially after large meals. Possible factors determining whether reflux occurs include abdominal straining, presence of hiatal hernia and degree of esophageal shortening and duration of transient lower esophageal sphincter relaxations. Pregnancy also increases the...
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...other organisms. This mutual ancestor that humans share with other organisms including rice that lived about 1.6 billion years ago. Chimpanzees and bonobos are our closet living relative. Researchers were able to come to this conclusion by comparing the genomes of chimpanzees and bonobos to the genome of humans. In this paper I will discuss why all organisms are related to each other, including humans. I will do this by using natural selection as a mechanism for evolution. Natural selection as a mechanism for evolution explains how organisms have changed over time to adapt to their environment. I will also provide the percent of relatedness in terms of nucleotide sequence. I will also discuss the Human genome project and its importance. The benefits of the human genome project extend far beyond determining who our closest ancestor is and how closely humans are related to mice and other organisms. In this paper I will also look at the technology that has been developed to enhance the findings the Human Genome Project. Humans Are Related To Other Organisms Humans share about 99% of our DNA with chimpanzees and bonobos. DNA (deoxyribonucleic acids) is the molecule that makes up an organism’s genome. DNA is located in the nucleus of eukaryotic cells and is found in the nucleoid of prokaryotic cells. DNA consist of genes which are instructions to make molecules called proteins. DNA’s serves a significant purpose to any organism it holds the instructions that is...
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...cultural development of humans continued, they looked for a greater variety of materials to cater for their needs. The twentieth century saw an explosion in both the use of traditional materials and in the research for development of a wider range of materials to satisfy technological developments. Added to this was a reduction in availability of the traditional resources to supply the increasing world population. Chemists and chemical engineers continue to play a pivotal role in the search for new sources of traditional materials such as those from the petrochemical industry. As the fossil organic reserves dwindle, new sources of the organic chemicals presently used have to be found. In addition, chemists are continually searching for compounds to be used in the design and production of new materials to replace those that have been deemed no longer satisfactory for needs. This module increases students’ understanding of the implications of chemistry for society and the environment and the current issues, research and developments in chemistry. 1.1 Construct word and balanced formulae equations of all chemical reactions as they are encountered in this module: • Acid reactions: o acid (aq) + base (aq) salt (aq) + water (l) o acid (aq) + active metal (s) salt (aq) + hydrogen (g) o acid (aq) + metal carbonate (s) salt (aq) + water (l) + carbon dioxide (g) • Cracking of long chain alkanes (e.g. decane) to give a shorter chain alkene & alkane o Thermal cracking (heated with steam in...
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...185 EQUILIBRIUM 185 UNIT 7 EQUILIBRIUM After studying this unit you will be able to • identify dynamic nature of equilibrium involved in physical and chemical processes; • state the law of equilibrium; • explain characteristics of equilibria involved in physical and chemical processes; • write expressions for equilibrium constants; • establish a relationship between Kp and K c ; • explain various factors that affect the equilibrium state of a reaction; • classify substances as acids or bases according to Arrhenius, Bronsted-Lowry and Lewis concepts; • classify acids and bases as weak or strong in terms of their ionization constants; • explain the dependence of degree of ionization on concentration of the electrolyte and that of the common ion; • describe pH scale for representing hydrogen ion concentration; • explain ionisation of water and its duel role as acid and base; • describe ionic product (Kw ) and pKw for water; • appreciate use of buffer solutions; • calculate solubility product constant. Chemical equilibria are important in numerous biological and environmental processes. For example, equilibria involving O2 molecules and the protein hemoglobin play a crucial role in the transport and delivery of O2 from our lungs to our muscles. Similar equilibria involving CO molecules and hemoglobin account for the toxicity of CO. When a liquid evaporates in a closed container, molecules with relatively higher kinetic energy escape the liquid surface into the vapour...
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...Green chemistry, also called sustainable chemistry, is a philosophy of chemical research and engineering that encourages the design of products and processes that minimize the use and generation of hazardous substances. Whereas environmental chemistry is the chemistry of the natural environment and of pollutant chemicals in nature, green chemistry seeks to reduce the negative impact of chemistry on environment by preventing pollution at its source and using fewer natural resources. As a chemical philosophy, green chemistry applies to organic chemistry, inorganic chemistry, biochemistry, analytical chemistry, physical chemistry and even chemical engineering. While green chemistry seems to focus on industrial applications, it does apply to any chemistry choice. Click chemistry is cited as a style of chemical synthesis that is consistent with the goals of green chemistry. The focus is on minimizing the hazard and maximizing the efficiency of any chemical choice. In 2005 three key developments in green chemistry were identified: use of superficial carbon dioxide as green solvent, aqueous hydrogen peroxide for clean oxidations and the use of hydrogen in asymmetric synthesis. Examples of applied green chemistry are supercritical water oxidation, on water reactions and dry media reactions. Bioengineering is also seen as a promising technique for achieving green chemistry goals. A number of important process chemicals can be synthesized in engineered organisms, such as shikimate, a Tamiflu...
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...Outline for Research Paper Topic: Fracking & Water Contamination in USA pressure in order to fracture shale rocks to inside. Hydraulic Fracturing or otherwise known as Fracking is a technique of drilling and injecting fluid into the ground at a high pressure in order to fracture shale rocks to extract natural gas. United States has numerous shale gas bases. Each gas well requires an average of 400 tanker trucks to carry water and supplies to and from the site. The water brought in is mixed with sand and chemicals to create fracking fluid. Approximately 40,000 gallons of chemicals are used per fracturing. In order to frack it needs up to 600 chemicals including carcinogens and toxins such as lead, uranium, mercury, ethylene glycol, radium, hydrochloric acid and formaldehyde. The fracking fluid is then pressure injected into the ground through a drilled pipeline, which goes about contaminating the wells, and threatens potential earthquake. The mixture reaches the end of the well where the high pressure causes the nearby shale rock to crack, creating fissures where natural gas flows into the well. During this process, methane gas and toxic chemicals leach out from the system and contaminate nearby groundwater. Methane concentrations are 17 times higher in drinking water wells near fracturing sites than in normal wells. Contaminated well water is used for drinking water for nearby cities and towns. There have been over 1000 documented cases of water contamination next to areas...
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...Vinegar Electrolytes S. Ramakanth Electrical And Electronics Engineering,Visakha Institute of Engineering and Technology, Visakhapatnam Abstract: This paper gives how salt water and salt vinegar is used as a renewable energy source. Working of salt water and salt vinegarelectrolytes and both the combination of electrolytes, comparison of different electrodes used in the electrolytes. And choosing which is the best pair of electrodes.applications of it in many fields. Keywords: Electro-chemicalreaction,Electrolyte,Vinegar,corrosion. INTERNATIONAL JOURNAL OF INNOVATIVE RESEARCH & DEVELOPMENT Page 310 www.ijird.com October, 2012 Vol 1 Issue 8 1. Introduction We know that our earth covered with 70% of water and 30% of land. So water occupies more space than land but 97% is the salt water and 3% is the fresh drinking water. Many technologies are developed to use salt water for producing electrical energy. The energy produced in this way is renewable energy source. Ex: salt water battery, salt water generators etc. The modern battery is found in high-tech applications ranging from hearing aids and pace-makers to pocket calculators, personal stereos, radios and mobile phones. They are everywhere and completely invaluable. The origin of the power behind the battery is chemical. In the following paper I explain the how the electrolysis occur and what are the different reaction of different electrodes for the better efficiency. 1.1How These Work –...
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...CARIBBEAN EXAMINATIONS COUNCIL Caribbean Secondary Education Certificate CSEC® CHEMISTRY SYLLABUS Effective for examinations from May–June 2015 CXC 21/G/SYLL 13 Published by the Caribbean Examinations Council. All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted in any form, or by any means electronic, photocopying, recording or otherwise without prior permission of the author or publisher. Correspondence related to the syllabus should be addressed to: The Pro-Registrar Caribbean Examinations Council Caenwood Centre 37 Arnold Road, Kingston 5, Jamaica Telephone Number: + 1 (876) 630-5200 Facsimile Number: + 1 (876) 967-4972 E-mail Address: cxcwzo@cxc.org Website: www.cxc.org Copyright © 2013 by Caribbean Examinations Council The Garrison, St Michael BB14038, Barbados CXC 21/G/SYLL 13 Contents RATIONALE ................................................................................................................................... AIMS ............................................................................................................................................. CANDIDATE POPULATION ............................................................................................................. SUGGESTED TIME-TABLE ALLOCATION ........................................................................................ ORGANISATION OF THE SYLLABUS .................................................
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