Oxidation Reduction Titrations: The Indirect Iodimetric Analysis Ascorbic Acid Unknown Number 69 I: Purpose: To determine the percent weight of Ascorbic Acid in unknown sample. This was to be done by the means of an indirect iodimetric analysis. In an iodometric analysis‚ the oxidizing agent can be determined by a different means than titrating directly with standard iodide‚ because a high concentration of I- is needed to form the I3- complex. In this type of analysis‚ excess iodide is added to
Premium Iodine Titration Electrochemistry
THE UNIVERSITY OF THE WEST INDIES □ Supplemental/Summer School □ Examinations of December /April/May □ /July □ 2009 Originating Campus: Cave Hill □ Mona St. Augustine □ Mode: On Campus By Distance □ Semester l Semester II Course Code and Title: CHEM1901 - INTRODUCTORY CHEMISTRY A Date: Duration: Time: 2 Hours. Paper No: 1 Materials required: Answer booklet: Calculator: (where applicable) Multiple Choice answer sheets: Programmable □ □ numerical
Premium PH indicator Quantum mechanics
Flask #1 7.8 Dark pink‚ fast change Flask #2 7.85 Light pink‚ fast change Flask #3 7.9 Light pink‚ slow change Mean Volume NaOH: 7.85 mL SD: 0.05 RSD: 0.64% Standardization of 0.1M NaOH Quantity of KHP added to 100mL H20‚ Phenolphthalein indicator then titrated
Premium Sodium hydroxide PH indicator Titration
put into the flask. Water was then added to the same flask. Then phenolphthalein indicator solution was added before we began titrating by adding more drops of the NaOH solution while swirling the flask until a pink color remained. The liquid levels were recorded on both burets. Part B: Solid unknown acid was added to a flask with water and swirled until almost fully dissolved. Then phenolphthalein indicator was added. With standardized NaOH solution we titrated and recorded the initial and
Free PH indicator Titration Concentration
chemistry. This reaction is also widely known as neutralization. In this experiment‚ we used titration technique which involves accurately measuring the volume of a solution required to react with another reagent. An indicator must be used to determine the end point of the titration. The indicator used can change colors at different pH values. OBJECTIVE To determine the concentration of sulphuric acid (H2SO4) using titration technique CHEMICALS NaOH solution‚ approximately 0.2 M‚ dilute sulphuric
Premium Titration Sodium hydroxide PH indicator
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
Premium PH Water PH indicator
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
Premium PH indicator Water PH
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
Premium Titration Sodium hydroxide Hydrochloric acid
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
Premium Acid PH indicator Milk
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
Premium PH indicator Base Acid