Name: Jayanti Magar Title: Observations of Chemical Changes Date: 02/11/015 Pre Lab Questions: Use what you learned in this lab to answer the following questions. A. Suppose a household product label says it contains sodium hydrogen carbonate (sodium bicarbonate). How would you test this material for the presence of sodium bicarbonate? I would add hydrochloric acid (HCl) with carbon dioxide with NaHCO3‚ and it should bubble and form gas. B. You know what color phenolphthalein and bromothymol
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Observations and Chemical Changes By: Andre the Giant Higgson 02/19/14 CHE 107 E1 Intro to Chemistry 1 Objective Certain Chemicals like Bromthymol blue and Phenolphthalein can be added to other chemicals to determine acidity or basicity. Other reactions can be observed as well when different chemicals are added to each other. Procedure This experiment involved placing drops of specified chemicals into a well on a 96well plate. Each well number was recorded along with question number and name of chemicals involved
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Wojcicki‚ Janet Maia 2002. "She Drank His Money": Survival Sex and the Problems of Violence in Taverns in Gauteng Province‚ South Africa. Medical Anthropology Quarterly 16(3):267-293. As well as having HIV prevalence at 22.4 percent among women‚ with women under 30 at the greatest risk‚ South Africa also has the highest number of reported rapes for a country not at war. Using research from Gauteng Province‚ Wojcicki examines links between gendered violence and HIV vulnerability. Beginning with
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purpose of this lab was to differentiate chemical changes from physical changes. During the separation lab we were given a test tube with Styrofoam‚ sand‚ salt‚ and Iron fillings in it‚ our goal was to issolate each component from the other. We were given certain tools and materials to help us figure out how to divide the components‚ therefore creating our lab. Doing this lab helped us figure out what component used physical change and which used chemical change‚ it also showed us which one was an element
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Lata Mangeshkar- The Pride of India India‚ one of the highest movie producing countries‚ has many great singers. One such singer‚ who has been singing for the past 60 years is non other then my favourite singer Lata Mangeshkar. Lata Mangeshkar is and has been the most heard voice in all of India for some time now. Lata has been active in all Indian popular and classical music‚ sung film songs‚ ghazals ‚ bhajans and pop (Nagma‚ 2004). Lata’s mesmerizing melodious voice has won fans all over the
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answer is that a pregnant woman’s body is always changing. When this is said‚ many think of the physical changes that one can see or feel. However‚ even though these physical changes are important‚ the true question is what causes these physical changes? Physical changes to a pregnant women’s body are the result of physiological changes. What is a physiological change? To understand what this kind of change is‚ the term physiology must be understood. Physiology is “the branch of biology dealing with
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Life Stages I will be explaining the physical and psychological changes which may be associated with ageing. Physical changes – skin‚ bones and joints * Skin becomes more wrinkled‚ thinner and less elastic. * Bones are less dense and are more likely to suffer from minor or serve injuries. * Joints stiffen and can be more painful as the bones thin out. * Muscles become weakened and loosen. * The spine may round which leads to hunched backs and other spine conditions. Senses:
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Physical and Chemical Properties Toby Orme-Lab 4 Solubility or Reaction Substance Name Color Odor Effect of Heat Cold H2O Hot H2O Litmus Test Dilute HCl Dilute NaOH Mg Silver N/A N/A Non soluble Bubbles Basic Hot/fizz N/A Cu Copper N/A Purple then turned black Non soluble N/A N/A N/A N/A Zn Silver N/A N/A Non Soluble N/A N/A Vaporized and fizzed N/A MgO White N/A Omits gas Hazy mix Boiled Rapidly Basic Got hot and fizzed Became thick or pasty CuCO3 Green N/A Turned black Hazy Green Became powdery
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Cultural‚ Biological‚ Physical and Chemical An entirely different perspective is brought into focus as we consider some of the environmental hazards that accompany industrial growth and intensive agriculture. Some of the most dangerous hazards in this world are the outcome of purely voluntary behavior --- in particular‚ smoking tobacco and engaging in risky sexual activity. We will look at four classes of environmental hazards: Cultural‚ Biological‚ Physical and Chemical (Wright & Boorse‚ 2011)
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While the text states that taking "drugs won’t enhance creativity"‚ I disagree‚ because for one‚ some of our best music comes from the major drug using era known as the 60’s‚ 70’s‚ & 80’s. All joking aside‚ I mainly just disagree with this statement in particular because I think it could have been worded a bit differently and really define what they mean by a “drug” especially because I think addiction affects everyone. What people think about when they see the word can be anything (usually derived
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