Data Collection Methods III Questionnaires A questionnaire is a preformatted written set of questions to which respondents record their answers usually within rather closely defined alternatives. Questionnaires are an efficient data collection mechanism when the researcher knows exactly what is required and how to measure the variables of interest. Questionnaires can be administered personally‚ mailed to the respondents‚ or electronically distributed. Guidelines for Questionnaire Design
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spectrophotometric analysis of copper sulphate Introduction: In the modern usage. The term spectroscopy includes a large group of techniques which differ widely in their mode of application and information they reveal. As a useful working definition‚ spectroscopy is a study of interaction of electromagnetic radiation with matter in the experiment it means it’s the usage of ultra-light to measure the absorbance of the copper sulpate. The regions of the electromagnetic spectrum immediately adjacent
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Stoichiometry and Limiting Reagents Theodore A. Bieniosek I. Purpose and Theory The purpose of the experiment is to study and apply the processes of stoichiometric calculation on a controlled chemical reaction. We will be adding variable amounts of reactants in a chemical reaction in order to demonstrate the effect of limiting reagents. Based on the volumes of the reactants‚ and their respective molarities‚ we can calculate the theoretical yield of the reaction and compare it to the
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Investigating Stoichiometry with Carbonic Acid Salts Problem: Testing the actual yield versus the theoretical yield of NaCl when HCl is titrated into Na2CO3 and NaHCO3. When 0.15g of both NaHCO3 and Na2CO3 are titrated with HCl‚ then 0.165g of NaCl should form from the NaHCO3‚ and 0.104g of NaCl should form from the 0.15g of Na2CO3. Procedure: Weigh 2 samples of 0.15g of dried unknown each‚ and dissolve each into 50mL of distilled water. Add 0.5 to 1mL of bromocresol green indicator until the
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Chemical Reaction of copper compounds Introduction: In this experiment‚ the objective was to conduct a series of chemical reactions that contain copper or copper compounds. That is to say that the products of each chemical reaction were used in the next reaction. The process starts with a solid copper wire dissolved in nitric acid and the end product is copper powder. The product which was used from the previous reaction is the limiting. In the initial step‚ the solid copper is the limiting reactant
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Copper Cycle Summary During the copper cycle lab‚ my partners and I performed a series of reactions on copper powder and observed the changes it underwent. For the first step‚ we mixed nitric acid and copper powder‚ and noticed that a yellowish brown gas emerged‚ along with effervescence. The red solid disappeared and became a blue liquid. We know that we produced copper nitrate‚ nitrate gas‚ and water because the only two blue solutions in “A New Language” are copper sulfate and copper nitrate
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Data Collection and Analysis The research project chosen was the comparison of the 12 ounce cans of Pepsi and Coke. The research team of five‚ individually purchased and tested 3 cans each of Pepsi and Coke. Enclosed below will be the procedure which was followed to obtain the data. The methodology used to measure the liquid was changed to accommodate the way that the tools recorded the measurements. The implications of the changes will be discussed to show that the integrity of the process was
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Copper Pipe | Plumbing Katy Copper pipe has been a top pipe choice for homeowner’s and business owners alike for over 7 decades. Due to its long term performance‚ and known history‚ it remains a highly popular pipe material. So popular‚ in fact‚ that over 80% of homes are plumbed with copper pipe. However‚ it does face growing competition from lower cost plastic options‚ such as PVC‚ CPVC and PEX. That said‚ copper may be the best option for your home’s plumbing in Katy. In the following‚ we will
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from a pure copper mug is considered very beneficial for our well-being. By storing water in one of the copper mugs‚ minute traces of copper will start to leach into the water. Plus‚ the water that is left in these mugs will stay fresh for a long-time and won’t start to taste stale. Here are five reasons to drink from a copper mug: Digestive system Copper contains beneficial properties that can promote the more efficient digestive system. A well-balanced diet that includes the copper-infused water
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Introduction This lab proposed the question of what happens when copper chloride and iron are combined and what is the balanced equation.By completing this lab‚ the goal was to determine the equation and product for the reaction of iron (Fe) and copper chloride (CuCl2). It was predicted either solid iron or solid copper would form. Methods To begin‚ 6.00026 grams of copper chloride was dissolved in 50ml of distilled water in order to have a solution with charged iron and chlorine atoms. Then‚ 6
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