The aim of this experiment was to calculate the concentration of an unknown solution of Sodium Hydroxide (NaOH) by titrating it with Hydrochloric Acid (HCl) and to identify any possible sources of error. A colour change from pink to yellow signified the end of each individual titre as the NaOH had been neutralised. Experimental: Method: Firstly two solutions were prepared to show the colour of the Phenol Red indicator in acid and alkaline conditions. These colours were then used to determine the
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State the principle of triple beam balance A beam balance measures mass as opposed to weight‚ so the mass you weigh will be the same on the moon as it is on earth. Gravity is taken out of the equation‚ unlike a spring balance that measures weight and would measure an article to be 1/6 of the weight on the moon as it would be on earth using the same spring balance that relied on gravity. The principle is that of moment‚ or turning force/torque)‚ calculated by force x distance. Fundamentally‚
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Carlie Haeffner Qualitative Analysis March 20‚ 2015 The purpose of this lab is to identify unknown ions in a solution by using a type of chemical reaction called precipitate reactions. The key to finding which ions are present in a solution is to form a precipitate which makes the ions “come out” in a reaction (McNeil‚ 2013-2014). Water is used in these experiments to act as a solvent. Since water is a polar molecule‚ the slightly positive and negative charges will sometimes pull apart molecules
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Spectrophotometric determination of Ascorbic acid Concentration in an Unknown Solution Introduction: The naturally occurring organic compound with antioxidant properties is Ascorbic acid shortly referred as (AA). Normally the color of Ascorbic acid is white‚ but in some cases of impure samples it appears yellow in color. Ascorbic acid is solid in state. In water it dissolves well to give mildly acidic solutions. Ascorbic acid is one form ("vitamer") of vitamin C [1]. So‚ Ascorbic Acid (AA) in other
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Name: Lauren Date: February 15‚ 2016 Title: May The Force Be With You Abstract: Experimental Question: How does the mass of the first model source car affect the acceleration of the second model source car at rest to in motion? Research: When we drive our cars‚ motorcycles‚ trucks‚ or any vehicle down the road‚ we are driving them at a certain velocity and direction. All vehicles have a mass to the order of a few hundred pounds. When our vehicles move at a certain speed down the road‚ they create
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to weigh a given hydrated salt as accurate as possible in order to determine the weight of water in the salt Introduction Balances are important laboratory equipment as they are used to determine the mass of materials. Today‚ most balances used in the laboratory are analytical balances which can give readings up to four decimal places or higher. High accuracy is needed in certain experimental work such as material analysis or those involving small change in material mass. Unknown masses of materials
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© cxcDirect Institute CXC MATHEMATICS CxcDirect Institute Solutions – May 2008 © All rights reserved. No part of this document may be copied without the written permission of theAuthor. cxcDirect Institute Mandeville‚ Jamaica Email: admin@cxcDirect.org Website: www.cxcDirect.org Telephone: 876 469-2775‚ 876 462-6139 © cxcDirect Institute © cxcDirect Institute ** Please see the original past paper for the questions. Only the answers will be provided as per copyright obligations
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ANALYSIS IN WORLD LITERATURE (SALT) Title of the story: SALT Written by: Kurt Wimmer Directed by: Phillip Noyce Starring: * Angelina Jolie as Evelyn Salt/ Sasha Fyodorovna Chenkova * Liev Schreiber as Theodore “Ted” Winter/Nikolai Takovsky * Chiwetel Ejiofot as Peabody * Daniel Ilbrychski as Vasily Orlov * August Diehl as Michael Krause Evelyn Salt a CIA agent two years ago was captured
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Bases and Salts Mabag‚ Viannery D.‚ Mangune‚ Paolo D. Chem 14.1‚ MAB1‚ Ms. Angelyn del Rosario March 8‚ 2010 I. Abstract The experiment allowed students to explore different electrolytes and classify them into acids‚ bases and salts by using different indicators or by measuring the pH levels of each. The experiment also helped students classify different substances through their conductivity properties. The preparation of a 1 M stock solution from NaOH pellets diluted to a 0.1 M NaOH solution was also
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Trust and mutual respect Transparency Partnership "Letter‚" borrowed from Old French lettre‚ entered Middle English around AD 1200‚ eventually displacing the native English term bocstaf (i.e. bookstaff). Letter derives from Latin littera‚ which may have derived‚ via Etruscan‚ from the Greek "διφθέρα" (writing tablet).[1] The Middle English plural lettres could refer to an epistle or written document‚ reflecting the use of the Latin plural litteræ. Use of the singular letter to refer to a written
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