of obsessive compulsive disorders. The most common type is contamination obsession. It is a fear of any disease or contact any subject. As a result of this‚ the person starts to over-clean‚ such as often hand washing. Excessive hand washing can sometimes even lead to a complete deep skin destruction. The person can spend most of their day at home by washing themselves or isolating themselves from being out because of fear of contamination. Another common obsession is ‘’ checking’’. The person may
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UNKNOWN SAMPLE #97 COMPLEXOMETRIC DETERMINATION OF WATER HARDNESS DR. BUDRUK CHM 152 LL SEAN MARKIS 4 FEBRUARY 2015 Introduction Using a Lewis base neutral molecule to donate electron pairs (ligands) to a Lewis acid metal ion center to form a single cluster (complex) ion. When the complex ions forms with a metal ion (chelation) the ligand used is called the (chelating agent). EDTA acts as a great chelating agent due to the Nitrogen and Oxygen donating an electron pair to the
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Water Analysis Lab Report Purpose: In this lab we will be testing a number of water samples. These water samples come from various water sources. Each of these water samples will undergo four different tests. The four tests include a pH test‚ a conductivity test‚ a total and phenolphthalein and alkalinity test‚ and a total hardness test. This lab requires comprehension of lab material and techniques learned in prior labs (Kippenhan‚ 2012). Procedure: Each
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an initial height of 4 feet at an initial velocity of 350 feet per second. The gravitational force of Earth is pulling the rocket down at a rate of 16 feet per second per second. The formula for‚ s(t)‚ for the function that models the height of the water balloon at time t‚ in seconds‚ is s(t)= -16t2 + 350t + 4. We can determine how long it takes for the rocket to land from the graph where the function intercepts the x-axis because this is the value where the height of the rocket is 0 feet. From the
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Cross contamination is critical matter and does go unnoticed. It’s not something many think about when out eating out‚ or preparing there own food at home. The remainder of this essay will include what is cross contamination and its symptoms‚ what prevention methods should be taken along with examples of food being contaminated. When an individual decides to eat out or eat at fast food restaurant’s they do not think of the harmful effects that could occur when an individual’s food is being handled
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Cross-Contamination and its Role in Food Poisoning Outbreaks Cross-contamination is one of the most major causes of food poisoning (Food Standards Agency‚ 2014). It is defined as ‘the process by which a substance that is harmful or dirty spreads from one area to another’ (Cambridge Online Dictionary‚ 2014) .There are 3 different types of contamination in the food industry; microbial contamination‚ physical contamination and chemical contamination‚ with microbial contamination being a more frequent
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| The Chemistry of Natural Waters | Chem 111 Sec 104 | | Hyunjung Hwang | 11/6/2012 | TA: Sarah Boehm‚ Group members: Rachel Hoffman‚ Dan Hirt | Introduction Water hardness is a major part of overall water quality that affects many industrial and domestic water users. Water is considered hard when there are high concentrations of the divalent cations Magnesium and Calcium; water hardness is considered as the sum of both the calcium and magnesium concentrations and expressed as
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Purpose: During our lab‚ Galileo’s Water Clock‚ we created our lab to describe the motion of a ball on a plane using the water clock as an alternative method for measuring time. Our main purpose in this lab was to determine if the displacement of the ball is determined by the time or the time squared. Procedure: Once the water clock was set up‚ a ball was let go from the ramp at various distances for three trials each. Once the ball was let go‚ the water clamp was opened and then immediately
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Determination of Water Hardness Using a Titrator Heather Crall Chemistry 1 SMT- 271044 10/17/2012 Abstract From seeing all of my results and conclusion I now see that I didn’t understand this lab very well and that its not easy when others try to help. Since I have hard water it tells me that my water flows over and through rocks and minerals‚ like limestone. Purpose The purpose of this lab is to become familiar with the concept of water hardness. We learn that hard water contains high
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transformation of the cultural type. Some old and more experienced people may claim that this kind of change is somewhat disrespectful to the convention‚ but the truth is a large number of cultures are formed by innovation. According to The Case for Contamination‚
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