Selection of Evaluation Participants Using Qualtrics Survey Software‚ an electronic survey was created to conduct an evaluation on the effectiveness of an intervention video. The survey design was a combination of a pre-post test‚ with addition of a retrospective pre-assessment design. Facebook and personal networks were the source of recruitment. Multiple Facebook messages were posted on the main page as well as on specialty groups. As an incentive‚ one dollar would be donated to a non-profit organization
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Determination of Iron by Reaction with Permanganate-A Redox Titration Purpose: The purpose of this experiment was to find the percentage of iron in an unknown iron oxide sample which could be determined through titration with a standard solution of potassium permanganate. Success in this analysis requires careful preparation and attention to detail. Performing this experiment also provides practice at titrations. The overall reaction is: 8H+(aq) + MnO4-(aq) + 5e- Mn2+(aq) + 4H2O Theory:
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Marisol Camacho AP Chemistry Per. 1-2 10/31/12 Titration Lab Titrations are a very useful method of discovering the amount or concentration of unknown substances. The method is very well suited towards acid-base reactions. Titrations are often used in industry to analyze products to be sold. In this lab‚ standardizations will be done in the first two experiments and then titration analysis in the third. Standardization of a base (NaOH) using a primary standard (KHP) Standardization of an
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XV. GIMNAZIJA International Baccalaureate Department Group 4 – Chemistry SL Lab no.2: Acid-base titration Student: Caterina Rende Dominis Teacher: Zrinka Toplićan Date: 19 November 2012 Data Collection and Processing (DCP) Aspect 1: Recording raw data Table 1 Table showing raw data collected from titration Known measurements 25 mL of diluted acid 0‚100 M of NaOH solution Measurement Number | V of alkali needed to neutralize acid /mL/ (±0.01 mL)
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CLUSTER ANALYSIS: ALGORITHMS AND ANALYSIS USING SAS BY: AHMED ALDAHHAN SUPERVISED BY: LECTURER JING XU BIRKBECK UNIVERSITY OF LONDON 2013/2014 ABSTRACT The scope of this paper is to provide an introduction to cluster analysis; by giving a general background for cluster analysis; and explaining the concept of cluster analysis and how the clustering algorithms work. A basic idea and the use of each clustering method will be described with its graphical features. Different clustering
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Acid-Base Titrations February 21‚ 2013 Abstract: With the given volume measurement of KHP and NaOH‚ the students experimented to calculate the mass of unknown acid and its equivalence point using a method called titration and titration curve. The known volume of an acid solution would be titrated by slowly adding drops of solution into NaOH‚ and the volume of base needed to react with the acid is measured throughout. By using those data‚ the students are able to find what they
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salt in an unknown sample. We performed titrations using Potassium permanganate which is a strong oxidizing agent‚ with unknown sample dissolved in deionized water. The result of the experiment was a 99.5% purity for the anhydrous iron (II) ammonium sulfate. Introduction: In this experiment‚ oxidation/reduction (or redox) will be used in the titration analysis of an iron compound. We will use potassium permanganate‚ KMnO4‚ as the titrant in the analysis of an unknown sample containing iron
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62.5 60 57.5 55 0 20 40 60 80 100 120 140 160 180 200 220 240 260 280 300 320 340 360 380 400 420 440 Time (seconds) Pure BHT BHT + pdB BHT + ??? The actual process may vary based on what version of Microsoft Office or OpenOffice.Org you are using‚ but it will be similar to the guidelines below. 1. Enter all your data values into a spreadsheet (Just like in the chart on the right) 2. Highlight ALL OF IT‚ and select “Insert → Chart” 3. Start to configure the chart. We want a XY Scatter Point
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ACID BASE TITRATION OBJECTIVES 1. To demonstrate the basic laboratory technique of titration 2. To learn to calculate molarity based on titrations INTRODUCTION Molarity (M) or molar concentration is a common unit for expressing the concentration of solutions. It is defined as the number of moles of solute per liter of solution (or millimoles of solute per milliliter of solution). The concentration of a basic solution can be determined by titrating it with a volume of a standard acid solution (of
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Analyzing Social Networks using NodeXL Abstract: Analyzing the social networks by finding page rank‚ betweenness and closeness centrality‚ degree‚ etc through programming requires a lot of coding (time consuming) and graphical representation of such large datasets is a challenge. Generating network statistics and metrics and creating visualizations of network graphs is made easy by using the tool NodeXL provided by the Microsoft in the familiar network of Microsoft Excel as a small add-in. In
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