Laboratory 3: Molarity Of Saline Solution Data: Please write your observations about the appearance of the solution. 1. Normal Saline- The solution appeared clear at the start with slight particles showing‚ once adding the salt it still appeared clear. 2. Nasal Irrigation Saline- Solution appeared cloudy once adding the salt and baking soda‚ then it turned semi-clear about 30 secs later; it was more concentrated than the normal saline. Results: 1. Determine the molar mass of NaCl. Show the workup
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1 Automatic Keyphrase Extraction and Segmentation of Video Lectures Arun Balagopalan‚ Lalitha Lakshmi. B‚ Vidhya Balasubramanian‚ Nithin Chandrasekharan‚ Ashwin Damodar Amrita School of Engineering‚ Amrita Vishwa Vidyapeetham‚ Coimbatore‚ India Abstract—Keyphrases are essential meta-data that summarize the contents of an instructional video. In this paper‚ we present a domain independent‚ statistical approach for automatic keyphrase extraction from audio transcripts of video lectures
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Purpose: The purpose of this experiment is to observe the colours produced when the solutions of metal ions are heated to high temperatures‚ then to explain the results in terms of the energy levels of the metal ions. Lastly‚ to use the flame colours to identify a series of unknowns. Hypothesis: Substance being tested Predicted flame colour NaCl(s) Yellow NaCl Red-Orange NaNO3 Dark Orange LiNO3 Red Sr(NO3)2 Dark Red KNO3 Blue-Indigo Ba(NO3)2 Yellow-Green Cu(NO3)2 Green Ca(NO3)2
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Foundation Improving social well-being through education‚ research and innovation Social Policy Education Capacity Building Teachers Apply for Funding Nuffield Foundation » Teachers » Practical Biology » > Bio molecules » DNA » Extracting DNA from living things Practical Biology A collection of experiments that demonstrate biological concepts and processes. In partnership with Society of Biology logo Search Practical Biology go Society of Biology CLEAPSS Topics > Cells to systems >
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it is a positive slope going from lower values to higher values. Also it passes through the origin because direct variation relationships are in the form of y = mx‚ where y and m are constant variables. For the absorbance value to zero‚ the concentration must be also be zero. Should the line of Concentration versus Absorbance go through the origin? As stated above‚ the line should touch and go through the origin eventually because it is a positive slope going from lower values to higher values
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EXTRACTION OF METALS SUMMARY Most metals exist in compounds in rocks in the Earth’s crust. Many of these ores contain oxides or sulphides of the metals. The compounds need to be reduced to produce the metals as elements. Metals are very useful to us because of their special properties. Reduction means removal of oxygen or gain of electrons. Carbon is a good chemical reducing agent because it readily combines with oxygen‚ but it is only useful for the metals below it in the Reactivity
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Caroline Guidry Dr. Beverly A. Clement Organic Chemistry 2423‚ Section 304 25 October 2017 Lab 6: Natural Products I The main goal of this experiment was to employ isolation techniques to derive chemicals from two different natural sources and study their properties (Clement 91). The two natural sources used in this experiment were an orange (the peel contains limonene‚ which is a terpene) and a dichloromethane solution of clove oil (which contains eugenol‚ an acetogenin). To isolate the eugenol
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Synthesis of Salicylic Acid from Wintergreen Oil Objective – Preparation of salicylic acid (organic synthesis) from methyl salicylate utilizing previously used procedure from the nineteenth century. The final product will then be evaluated in comparison to salicylic acid made from benzene. Discussion – In this synthesis‚ methyl salicylate is the starting material or precursor and salicylic acid is the target product. It is the major constituent of wintergreen oil. The difference in structures
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KHP+H2O-------H3O+ + KP- In our second part of our experiment to determine the molarity of NaOH‚ we rinsed a burette with about 5ml of water and another 5ml of NaOH to prepare it for the experiment. We then measured exactly 25ml of the prepared KHP from the previous part into a 250ml Erlenmeyer flask and added 2 drops of the indicator‚ phenolphthalein. Next we filled the burette with the approximately 0.1 M NaOH so that our initial volume will be 0.0mls. We then started our titration by carefully
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carbohydrate structure. This could be solved by amending the aim or by constructing some sort of pre-experiment with the bread that would be used to compare the structure of Danskt Rågbröd compared to Rosta‚ which could be used to explain the results obtained from several trials‚ a control and a bigger sample size. With this‚ the aim would be fulfilled and the study would have had a stronger connection to the biochemistry unit we were working
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