Acid 2.83 2.94 13 Petr Sodium 0.5M NaC6H5O7 Weak Base 9.23 9.21 14 Sodium Sulfate 0.25M Na2SO4 Weak Base 7.24 7.23 15 Potassium Sulfate 0.25M K2SO4 Weak Base 7.37 7.58 Dilution of 1M of acetic acid to 0.1M and 0.5M 0.5M of HCl dilution: Vi(0.5M)(0.025L)1Mx1000=12.5mLof HCl used + 12.5mL of water. 0.1M of HC2H3O2 dilution: Vi(0.1M)(0.025mL)1Mx1000=2.5mL HC2H3O2 used + 22.5mL of water. HC2H3O2 was provided in a concentration of 1M. Solution Observations: All the solutions where clear liquids
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Objective Determine the concentration of acetic acid of vinegar‚ in terms of (m/m). Introduction Neutralization is a reaction of an acid with a bases to produce a salt and water. For example‚ the reaction of the strong acid HCl with the strong base NaOH produces the salt sodium chloride and water HCl(aq) NaOH(aq) ( NaCl(aq) H2O(l) Since the acid‚ base‚ and salt in this reaction are all strong electrolytes‚ the net ionic equation for this reaction is H(aq) OH-(aq) ( H2O(l) This same result
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Aim: To know the procedure of measuring the accurate mass of a solid To calculate the number of moles of an unknown mass from its mass and molecular mass To know how to dilute a solution and the effect of dilution on the solution’s absorbance Materials: Copper Sulfate Coloured solution – Potassium Manganate (KMnO4) Hotplate Method: Part A: The Formula of Hydrated Copper (II) Sulfate Firstly‚ about 1.0 g of hydrated copper (II) sulfate was put in the weighing bottle and the colour
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TITLE: Determination of Riboflavin by using UV-Vis spectrophotometry. ABSTRACT: The amount of Riboflavin in various brand of children multivitamins was determine by using UV-Vis spectroscopy instrument‚ the series of standard of riboflavin was prepared in order to determine the amount of the riboflavin in the sample of children multivitamins. The maximum amount of riboflavin was found in the Champs multivitamin that contains 0.1155 mg followed by Chewies 0.1131 mg and Scott’s 0.0672 mg. OBJECTIVES:
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Experiment 2: Estimation of protein concentration Introduction Protein assays are designed to measure the total protein in a solution. Protein assays are quantitative if the protein to be assayed is available in sufficient quantity such that one is able to use it to create a standard curve. If this cannot be achieved‚ then a standard protein‚ such as albumin‚ may be used for a standard curve with the understanding that the results on the unknown protein are semi-quantitative. Since most proteins
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SUPPLEMENTARY MATERIAL I Unit V: States of Matter 5.7 KINETIC ENERGY AND MOLECULAR SPEEDS Molecules of gases remain in continuous motion. While moving they collide with each other and with the walls of the container. This results in change of their speed and redistribution of energy. So the speed and energy of all the molecules of the gas at any instant are not the same. Thus‚ we can obtain only average value of speed of molecules. If there are n number of molecules in a sample and their individual
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CFS WRITE UP ON CASE 6 BY SUSHMA T Session 6 – Structuring Repsol’s Acquisition of YPF Suggested Questions: 1) How significant are the expected synergies and restructuring effects? Please prepare an estimate of the value of these. For Repsol and its shareholders‚ the YPF acquisition deal is seen as an ideal strategic match. The Spanish oil company gets most of its revenues from activities like refining and gasoline stations‚ and must buy much of its crude oil from others‚ while YPF owns
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in sample / total mass of sample) (100%) = (7.92 x10^-6 g / 0.1019 g) (100%) = 8.07 x10^-7 (100%) = 8.07 x10^-5% Sample Calculations: Concentration of standard solution (Red #40): Stock: 4.03 x10^-5 M Dilution 1:4 = Stock (1/4) = 4.03 x10^-5 M (1/4) = 1.0075 x10^-5 M Concentration of dye (Red #40): Grape: Red #40: C = A/Eb = (0.522) / (1.274 x10^-4) = 4.097 x10^-5
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include hydrogen ions‚ aluminium ions ‚and iron(II and III ions). Base forming cations commonly comprise of calcium ions‚ magnesium ions‚ sodium ions and potassium ions. It is also known that the CEC is positively correlated with soil pH. As the dilution of the soil solution increases‚ the pH is also seen to increase. The effect of adding water and occasional mixing during the 30 minute period is to allow the soil and the water to approach equilibrium conditions. Water will begin to progressively
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The article‚ Biotreatment of wastewater using aquatic invertebrates‚ Daphnia magna and Paramecium caudatum‚ mainly pertains to the idea of cleaning dirty‚ polluted water. Every since we‚ as a society‚ have switched from an agrarian to an industrial way of life‚ our waters have become increasingly polluted. Thus‚ scientists have researched conducted experiments in order to attain clean water. One of the failed attempts of attaining clean water was one in which they tried to use chemicals. Unfortunately
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