produced with the nitrogen so the potassium nitrate adapts with the sodium to make the hazardous sodium oxide less harmless. The uses of the stoichiometry cffffffffffffffffffffffffffffffffffeeeeer bags are located inside automobiles. The air bag is in front of the passenger seat inside the dashboard. Once the vehicle gets into a crash the air bag pops out. The air bags are filled nitrogen gas. Hazardous sodium metal is also produced with the nitrogen so the potassium nitrate adapts with the sodium to
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a sweetener: Ace K I chose this particular sweetener because I have never heard of it until now and it sparked my interest. 2. Explore the history of the sweetener (when it was developed‚ its composition). Ace K is short for Acesulfame Potassium‚ or sometimes just Acesulfame K. It is also often called by the names: Sunett‚ Sweet One‚ and Sweet ’n Safe. Ace K was discovered by Hoechst scientists in Frankfurt‚ Germany‚ in 1967. It is a calorie-free sweetener that is used and approved in
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LAB REPORT 4 DETERMINING AN EQUILIBRIUM CONSTANT CAUSION 1. Potassium thiocyanate (KSCN) is hazardous 2. Wear protective material before performing the experiment. INTRODUCTION This experiment outlines the techniques necessary to determine the equilibrium constant for the formation of an iron(III) thiocyanate complex ion (FeSCN2+) from Fe3+ and SCN- . The quantitative preparation of several solutions and subsequent measurement of the solution absorbance
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first part (Part B) benzoin was oxidized using nitric acid to make benzyl as a product. This reaction is characterized by the orange gas of nitrogen oxide that is liberated as a byproduct of the reaction. In Part C the benzyl was combined first with potassium hydroxide to make the carboxylate salt intermediate and second with hydrochloric acid to from the benzylic acid. For both reactions the organic compound was the limiting reagent‚ so one mole of product is expected for each mole of organic reagent
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standard solution Aim To prepare a standard solution of potassium hydrogenphthalate which will later be used to standardize sodium hydroxide solution‚ NaOH. Research question How does different molarity of potassium hydrogen phthalate solution which is prepared by dilution process influence the volume of sodium hydroxide‚ NaOH used during titration process until the colourless phenolphthalein indicator solution turns pink where the volume of potassium hydrogenphthalate used is kept constant at (22.5 ±
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Potassium Argon Dating Potassium-Argon dating is a form of radiometric dating which tells us the absolute age of rocks. Practically all elements are radioactive to some extent‚ some more than others. Moreover‚ different isotopes of elements are more radioactive than others. Isotopes are forms of a particular atom that varies in the number of neutrons in the nucleus. For instance‚ K-40 is a naturally occurring isotope of Potassium is far more radioactive than its siblings K-39 and K-41 because K-40
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Aim: To determine the rate law of chemical reactions Introduction: The aqueous solution of potassium peroxydisulphate can oxidize potassium iodide as follow: Equation: K S 0 (aq) + 2KI (aq)->2K S0 (aq)+I (aq) 2 2 8 2 4 2 KI(aq) +I (aq) -> KI (aq) 2 3 _________________________________________________ K S 0 (aq) +3KI(aq) -> 2K S0 (aq)+ KI (aq) 2 2 8 2 4 2 The rate law of this reaction can be represented as follow: Rate=k[S208 2-]^a [I-]^b When the concentration of peroxydisulphate ions
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Name : ……………………………………………………………….. Date Due : …………………………………………………………….. Year 12 80% A 70% B AS Level Chemistry 60% C 2008 – 2009 50% D 40% E Below U Questions on % Haloalkanes 2.8 32 1. Chloromethane can be prepared by a reaction between methane and chlorine in the presence of ultraviolet radiation. (i) Outline the mechanism for this reaction. .....................................................................................
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of the beaker‚ and then topped. After the eluting solution has risen to within two centimeters of the top of the filter paper‚ the paper was removed from the beaker‚ dried‚ and was stained with a staining reagent solution containing potassium ferrocyanide and potassium iodide. This reagent forms colored precipitates or reaction products with many cations‚ including all of those used in this experiment. The distance of which the spots moved were determined by calculating the Rf value of each substance
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Methods of Sample Preperation Initially the plates were rinsed with ethanol‚ then dried with lint0free tissues. Next 1-2 g of benzoic acid were transferred to a mortar and a pestle was then use to grind the sample. About 100-150 mg of oven dried potassium bromide were added into the mortar and mixed well and then grinded. Next a screw was attached to a bolt and tightened together to make a sample holder. Next another screw was attached to the bolt to fasten it. The sample holder was then mounted
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