Chemistry EEI Introduction: Corrosion is the returning of metals back into their natural constituents when exposed to an atmosphere with which it can react. Both metals and non-metals are able to undergo redox reactions as well as other ceramics and polymers which are known to undergo a similar process which is referred to as degradation. This investigation aims to outline and assess the factors affecting corrosion and explore in depth how redox reactions work. Reduction and oxidization reactions
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EXPERIMENT 1 DETERMINATION OF ASCORBIC ACID CONTENT IN VITAMIN C TABLETS INTRODUCTION To calculate the mass of the ascorbic acid and hence the mass percentage of ascorbic acid in the vitamin C tablet. PROCEDURES (Refer to Lab Manual) 1. Accurately weight vitamin C (effervescent type) in a 50 ml beaker. Add about 30 ml of deionised water to dissolve the vitamin C tablet. Once the tablet has dissolved completely‚ transfer the solution into a 250 ml volumetric flask via a plastic filter
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CHM 256: BASIC ANALYTICAL CHEMISTRY TUTORIAL 1: INTRODUCTION: ANALYTICAL CHEMISTRY 1. What is chemical analysis? 2. Differentiate between qualitative and quantitative analysis (Oct 2008‚ 2009‚ Dec 2009‚ Apr 2010) 3. Give 7 steps in performing any chemical analysis (Apr 2010) 4. Briefly explain how to prepare the following solutions: a) 1.0 L 10.50 % (w/v) aqueous CH3CH2CH2OH (answer : 105 g) (Oct 2006‚ Oct 2007‚ Oct 2008) b) 500 mL 2.0 M H2SO4 from a commercial reagent‚ at 90% (w/w) purity
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Quantitative Determination of Gravimetric Analysis Ophelia Low Gek Suan 1311907DBT/FT/1A/01 | SYNOPSIS By gravimetric analysis‚ we are able to determine the amount of sulphate in barium sulphate quantitatively. We can do so by slowly adding dilute barium sulphate to an unknown sulphate solution that has been heated and acidified with concentrated hydrochloric acid slightly. A white precipitate will be yield from filtering the solution
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for the compound formed from the most common ions of Ca and O Chapter 5 Name the following compounds: P4O10 CoCl3 Li3P HClO3 RbOH Calculate the formula mass of copper(II) sulfate pentahydrate (CuSO4·5H2O) Chapter 6 Calculate the number of moles and number of molecules in 65.78 g of H2O. How many H atoms and how many O atoms are contained in this sample? NutraSweet is 57.14% C by mass‚ 6.16% H by mass‚ 9.52% N by mass‚ and 27.18% O by mass. Calculate the empirical formula of NutraSweet
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produced a 1:1. Thus the number of moles of H2 can be determined if the number of moles of Mg is found. The experimental volume of H2 is found in the experiment and by using the gas laws of both Boyle and Charles. The volume of H2 can be determined
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Introduction: Molarity (M) is used to determine concentration. Molarity is found by dividing the number of moles of a solute by the volume of the solution in liters. Multiple series of solutions with different concentrations can be used by diluting the concentration. The dilution technique is: Number Moles Concentrated Solution = Number Moles Dilute Solution. An instrument called a spectrophotometer detects the amount of light that passes through the sample and the percent transmittance can be recorded
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Ammonia is produced from a reaction as shown in the equation H2(g) + 3N2(g) 2NH3(g). The number of moles of hydrogen required to produce 12 moles of ammonia is a. 1 d. 8 b. 3 e. 12 c. 6 ____ 6. Cola soft drinks have a sucrose concentration of 11g/100mL. What mass of sucrose is present in a 355-mL can of cola? a. 11g d. 22 g b. 39 g e. 0.11 g c. 30 g ____ 7. What is the molar volume of 0.1 moles of SiF4 at SATP? a. 44.8 L d. 2.24 L b. 1.0 L e. 16 L c. 2.48 L ____ 8. Which of the following
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EXPERIMENT 1 “HOW DO I LOVE THEE LET ME COUNT THE WAYS...” DETERMINATION OF AVOGADRO’S CONSTANT Techniques Calibration drop counting MSDS available for • • stearic acid‚ CH3(CH2)16COOH cyclohexane‚ C6H12 Principles molar volume molecular structures surface areas and volumes Avogadro’s constant percent error Recommended Advanced Reading Chapter 3 in Petrucci‚ Herring‚ Madura‚ & Bissonnette’s General Chemistry‚10th Ed. Avogadro Constant...1 INTRODUCTION
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Modbury High School SACE Stage 1 Chemistry Topic 5 Mole Concept and Stoichiometry Assignment 5: Volumetric analysis (titrations)‚ stoichiometry SOLUTIONS Note: Write answers neatly and legibly in your exercise book or on pad paper. ALWAYS include a title and name for your work and clearly indicate each answer. 1. a) 23.08 and 23.00 mL are concordant titre values. Average titre = (23.08 + 23.00) = 23.04 mL 2 b) Ca(OH)2
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