Quantitative Chemistry –Titration Determination of the Molarity of an Unknown Solution through Acid-Base Titration Technique 1. Introduction 1.1 Aim The aim of this investigation was to determine the precise molarity of two (NaOH(aq)) sodium hydroxide solutions produced at the beginning of the experiment through the acid-base titration technique. 1.2 Theoretical Background Titration is a method commonly used in laboratory investigations to carry out chemical analysis
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constant. a. What is a mole? mole (mol): the SI unit used to measure the amount of a substance‚ number of representative particles. representative particle: any kind of particle such as atoms‚ molecules‚ formula units‚ electrons‚ or ions. Avogadro’s number: 6.022 136 7 x 10²³‚ volume of one mole of a gas determined by Amedeo Avagadro in 1811. B. Converting Moles to Particles and Partciles to Moles number of moles x 6.02 x 10²³ representative particles /1 mole = number of representative
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Unit Conversions Tutorial Tools to help us with unit conversions are called conversion factors. Most books have tables either in the front or as appendices in the back with all different kinds of conversions factors‚ such as from one unit system to another (Metric to English) or within the same unit system. Unit analysis technique Step 1. Get the conversion factors needed. Step 2. Draw lines to create boxes Column 1 | Column 2 | Column 3 | 1 | 3 | 5 | 2 | 4 | 6 | Note: Depending
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. Tf = Kfmsolute Kf = Tf/msolute where msolute equals the molality of the solute. What is the molality of the solute? msolute=molality of solute = moles of solute/kg solvent moles of solute = 1.00 g 1‚4-DCB/146.9 g/mol = 6.81 x 10-3 moles 1‚4-DCB kg of solvent = 10.00 g naphthalene/1000 g/kg = 0.01 kg solvent msolute = 6.81 x 10-3 moles 1‚4-DCB/0.01 kg naphthalene = 0.681 m Kf = 2.8°C/0.681 m = 4.112 K·kg/mol The actual value for Kf for naphthalene is 7.45 K·kg/mol‚ so we’re a fair amount
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In chemistry‚ this formula weight is a quantity computed from multiplying the atomic weight of units by each element in the chemical formula by the number of atoms which are present in the formula. Finding molar mass starts with units of grams per mole. The formula weight is simply the weight in atomic mass units of all the atoms in the given formula. There are many household products which contain this ingredient are typically in the category of home maintenance or personal care‚ that you may
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but also the number of moles of particles. ________true__________ 5. The mass of each reactant and product is related to its coefficient in the balanced chemical equation for the reaction by its molar mass. Complete the table below‚ using information represented in the chemical equation for the combustion of methanol‚ an alcohol. methanol oxygen → carbon dioxide water 2CH3OH(l) 3O2 (g) → 2CO2(g) 4H2O(g) Substance Molar Mass (g/mol) Number of Molecules Number of Moles (mol) Mass (g) 6.
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Molar mass Na2CO3= 105.99g/mol Mass of Na2CO3= 0.2123g Moles of Na2CO3= 0.2123g/105.99g/mol Moles of Na2CO3= 2.003 x 10-3 moles Mole-to-Mole Ratio 1 Na2CO3: 2 HCl Moles of HCl= 2 x 2.003 x 10-3moles Moles of HCl= 4.006 x 10-3 Molarity of HCl= (4.006 x 10-3)/0.04304 Molarity of HCl= 0.09308M Moles of HCl= 0.09308M x 0.03073L Moles of HCl= 2.8601 x 10-3 moles Moles of Na2CO3 = (2.860 x 10-3 moles) / 2 Moles of Na2CO3 = 1.4301 x 10-3 Mass of Na2CO3== 1.4301 x10-3
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Title: Spectrophotometric analysis of a two-component mixture Aim: i. To prepare working standards of dichromate and permanganate ii. To measure the absorbance of the prepared working standards of dichromate and permanganate using a spectrophototometer iii. To determine the concentrations of permanganate in a mixture of unknown. Abstract: Working standards of dichromate and permanganate were prepared and absorbance for each found. This was done in order to plot
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Determination of the Composition of Cobalt Oxalate Hydrate Experiment 12 Robbie Kinsey Partner: Debnil Chowdhury Chem. 1312-D TA’s: Russell Dondero & Sylvester Mosley February 9‚ 2000 Purpose The purpose of this lab was to determine the percent cobalt and oxalate by mass‚ and with that information‚ the empirical formula for cobalt oxalate hydrate‚ using the general formula Coa(C2O4)b.cH2O. Procedure The powdered cobalt oxalate
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Equation HX + NaOH NaX + H2O 1 mole 1 mole 1 mole 1 mole Aim To analyze the Vitamin C from a rival company and compare with that of my company and find out the best value for the money spent by the consumer. Controlled Variable * Mass of the tablet and hereby vitamin C in rival company tablets * Consistency of components in the Vitamin C tablet * Concentration of NaOH Apparatus 1. Burette (50ml) 2. Conical flask (50ml) 3. Vitamin C tablet (1 tablet
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