This page intentionally left blank Copyright © 2008‚ New Age International (P) Ltd.‚ Publishers Published by New Age International (P) Ltd.‚ Publishers All rights reserved. No part of this ebook may be reproduced in any form‚ by photostat‚ microfilm‚ xerography‚ or any other means‚ or incorporated into any information retrieval system‚ electronic or mechanical‚ without the written permission of the publisher. All inquiries should be emailed to rights@newagepublishers.com ISBN (13) : 978-81-224-2652-6
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experiment at a glance but as we read through we found it helpful. We decided to add this on our list of proposals. We were also curious and wanted to know the acidity and alkalinity of certain liquids since this is like an acidity or alkalinity indicator. This study can help many people‚ the ones that need or want to verify acidity levels. With this experiment‚ students can make some chemistry projects easier that involve pointing out the acidity or alkalinity of many substances and it is a bit easy
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Jobelle J. Department of Chemical Engineering‚ Faculty of Engineering University of Santo Tomas España‚ Manila February 27‚ 2013 Abstract The analyte used is the soda ash which is titrated with an HCl titrant‚ standardized by Na2CO3. The indicators used are phenolphthalein for basicity and methyl orange for acidity. The two volumes of the titrant are then used to calculate percent composition of soda ash analyte. At the end of the experiment‚ the calculated average percent by mass of Na2CO3
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Biomedical LITMUS MILK Litmus milk is a complex medium that can potentially distinguish many species of bacteria. Litmus milk has several components that can be metabolized: lactose (milk sugar); casein (milk protein); and litmus (a pH indicator). If lactose is fermented‚ the solution should turn pink. If gas is produced during fermentation‚ you may be able to see bubbles or cracks in the milky medium. If lactose is not fermented and proteins are metabolized instead‚ the solution will become
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tablet. A known concentration of sodium hydroxide was used and the value found was compared to the stated amount of ascorbic acid listed on the vitamin container. Also in this lab the acidity of different salt solutions were tested using different indicators including litmus paper. Procedure: (titration) 1. Weigh a vitamin C tablet‚ record it’s mass‚ then use a mortar and pestle to crush the tablet. 2. Weight half the tablet then transfer quantitatively to an Erlenmeyer flask. Repeat with
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value of substances & estimate the pH value by using the universal indicator. 2. Use the indicator to identify acidic‚ basic‚ and neutral substances found in any home 3. Classify household items as acids and bases 4. Collect organise and analyse results in tables and graphs (if necessary) 5. Analyse results and explain the reason the substances have the pH obtained. Aim – To use a universal indicator to measure the pH of various household substances and to identify acidic
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A B C D E F Bromothymol Blue Universal Indicator Phenolphthalein Litmus Paper Analyze: 1) F‚ C‚ D‚ B‚ A‚ E 2) D is neutral because it turned to the colour of green when it came in contact with the indicator Bromothymol Blue. The acid or base is green between 6.0-7.6 pH. 3) Solution E is more alkaline (more basic) than solution A because when E came into contact with the indicator Bromothymol Blue it turned into a darkish blue colour while A turned into
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Lab Report: Acid and Base Indicator Lab The title of my lab report is “Acid and Base Indicator Lab” this lab is testing what household solutions area bases depending on what color they changed. You have to use the pH balance scale to determine Acid‚ Base‚ and Neutral. On this lab we used 7 different solutions to determine if it’s either base‚ acid‚ and neutral. These are ammonia‚ vinegar; drain cleaner‚ soft drink‚ baking soda‚ detergent‚ and lemon juice are the solutions that are going to be
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become a stock culture to prevent the shortage of slants during performing the series of tests. Kliger’s Iron Agar tests can be used to determine multiple characteristics of unknown microorganism #17. Kliger’s Iron Agar slants also contains a pH indicator‚ phenol red‚ which can be used to test the presence of fermentation. If there is a glucose or lactose fermentation‚ the acid will be produced‚ and the color will change from red to yellow. If there is only glucose fermentation‚ the slant will have
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concentration of an unknown solution by reacting a strong acid with a strong base. Titrations are hard to accomplish‚ though‚ due to the fact that indicators used to show the endpoints are very sensitive and one drop could make the solution titrate past its endpoint. Blue stock solution: 3 mg/L Yellow stock solution: 35 mg/L Phenolphthalein is the indicator used (6 drops per titration) Molarity of NaOH used: .05056 M Start with 25 mL green Kool Aid Dillution factor: 100mL/25mL green Kool Aid= 4
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