Chemistry Investigative study Title: Determination of amount of phosphorus content in different brands of fertilizers Objective: To determine the amount of phosphorus in different brands of fertilizers Apparatus: Beakers(250 cm3) ------------------------------------------------------------------------------- 3 Measuring cylinder(10cm3)------------------------------------------------------------------- 1 Measuring cylinder(100cm3)-----------------------------------------------------------------
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119–124 Simultaneous determination of copper‚ zinc and lead by adsorptive stripping voltammetry in the presence of Morin E. Shams a‚∗ ‚ A. Babaei b ‚ M. Soltaninezhad b a Institute for Advanced Studies in Basic Sciences‚ Zanjan 45195-159‚ Iran b Department of Chemistry‚ Arak University‚ Arak‚ Iran Received 24 November 2002; received in revised form 5 September 2003; accepted 15 September 2003 Abstract A sensitive and selective method for the simultaneous determination of copper‚ zinc and
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then subsequently titrated with thiosulfate solution‚”2 being the difference from the former type of iodine titration. Iodometry is more widely used‚ as in this experiment‚ because there are only a few strong reducing agents; thus few iodometric determinations. (2) As mentioned earlier‚ iodometry involves the oxidation of iodide ion; it is added in excess to the oxidizing agent being determined. This would result to the formation of iodine which would be titrated with the standard thiosulfate solution
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INTRODUCTION EDTA (H₄Y) is widely used to determine metals in complexometric (a volumetric analysis where the formation of a coloured complex is used to indicate the end point of a titration) titrations as it forms stable complexes with most metal ions. EDTA is a tetracorboxylic acid and in alkaline conditions‚ it exists as Y⁴⁻ ions‚ which form 1:1 complexes with metal ions like nickel(II) ions: Y⁴⁻ + Ni²⁺ NiY²⁻ A metal ion indicator (an organic dye which changes colour when it binds with metal
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In 1993‚ the UN General Assembly provided a framework for action called the Declaration on the Elimination of Violence against Women. However‚ almost 25 years later‚ 1 in 3 women still experience physical or sexual violence‚ mostly by an intimate partner. This is just a small part of the inequality towards women. Today‚ including western countries‚ women experience poorer education‚ lower health and inequality (UN Women‚ 2016). Sexual and physical abuse is just the tip of the iceberg. It is estimated
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Synthesis of Salicylic Acid and Potentiometric Determination of its Purity and Dissociation Constant ------------------------------------------------- Abstract The purpose of the study is to synthesize salicylic acid from the ester‚ methyl salicylate‚ and determine the acid’s dissociation constant and purity. The ester was converted to salicylic acid by base hydrolysis. The products were refluxed and recrystallized‚ to ensure maximum purity‚ and filtered‚ dried‚ and weighed. The melting point
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Thermochemistry: An Ice Calorimeter Determination of Reaction Enthalpy Heidi Moen Chemistry 151 Lab Section No. 47905 09/02/2010 Instructor: John Weide Abstract: In this experiment‚ an ice calorimeter was used to measure the energy transferred from a system to the surroundings in an isothermal heat transfer. By measuring the change
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The Good Earth: Wang Lung - A Man of Determination and Loyalty Pearl S. Buck shows her readers the many faces of Wang Lung in her book‚ The Good Earth. Wang Lung is a rice farmer who gains all his wealth through the land. He struggles to move from poverty to a well respected wealthy man. Wang Lungs character portrays a man’s unselfishness‚ determination‚ and loyalty towards his family and friends. Wang Lung’s caring and generous nature towards his family and friends make him a well-liked
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Basketball: a game that requires quickness‚ strength‚ intelligence‚ and focus on both the offensive and defensive end. It is difficult‚ though‚ to play this game and maintain these skills when you’re defending or being defended by the lightning-fast Sean Michael Frank. Sean Michael Frank‚ a 22 year-old basketball player from the island of Pohnpei‚ prides himself for his speed and quickness both offensively and defensively. “Give him an opening for a split-second‚ and he will make you suffer by blowing
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The Effects of Household Detergent on Germination and Biomass Production of Pinto Beans and Radishes Introduction and Background: Plants are a diverse kingdom that gives vital sources of food‚ energy‚ and oxygen to sustain life on the planet. Plant classification is divided into four major groups including mosses and liverworts‚ ferns‚ conifers‚ and flowering plants. Plants we most commonly identify ourselves with is edible fruits and vegetables. There are a variety of types of vegetables from
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