With my test result‚ it clearly shows that the concentration of sulfuric acid is 0.05 mol/dm3 using the concentration equation‚ c= n/v. 25 cm3 of the volume with sodium hydroxide is equal to 0.025 dm3 by dividing a thousand with cm 3 and multiply it with 0.1 mol/ dm3 which is the concentration of sodium hydroxide. With the ratio between sulfuric acid and sodium hydroxide is 1 to 2 so‚ 0.0025 should be divided by 2 and 0.00125 moles of sulfuric acid is come out. Finally‚ using c = m/v‚ 0.00125 mole/0
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Experiment 3: Separating and Determining the Mass of Calcium Ion in a Calcium-Enriched Tablet In this lab‚ we dissolved a calcium-enriched tablet and participate the calcium ion as calcium carbonate. Our purpose is to determine the masses of calcium carbonate and calcium ion‚ to determine the mass percent of calcium ion in the tablet and to compare the masses and the percent with the listed tablet ingredients. This time we used a 150mL beaker‚ analytical balance‚ forceps‚ a 50mL graduated cylinder
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In the first process of the lab‚ you measure the mass of water transferred from a buret to a beaker‚ to determine the experimental mass of the water‚ and the volume of the water collected. We measured the temperature of the water so we could calculate the density of the water‚ which enabled us to calculate the actual volume of water‚ by using the density and the measured volume of water. To determine the percent error‚ we had to subtract the actual volume of water by the experimental volume of water
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One of the wonders of this planet is water. Water makes up 65% of humans‚ and 70% of the Earth. It is also common knowledge that humans cannot survive three days without it. Water is essential. If almost three-fourths of Earth is made up of water‚ why are there still so many people in the world suffering from a lack of it? Although not all water can be used for drinking purposes‚ in many places‚ water that is drinkable- is polluted or deluded by many agricultural and industrial motives and damage
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In the first week of the experiment‚ the goal was to find the moles of NaOH‚ as well as a 0.1 molarity‚ while in the second week to goal was to determine the percent KPH in the sample. The first week titrations were successful and had very similar amounts of pink‚ which shows the precision of the results. The best trials were in the sample trial and the second and third trials. The average molarity calculated for the first week was 0.1017 M. This very close to the 0.1 M that was supposed to be made
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This article was downloaded by: [78.39.229.183] On: 10 March 2013‚ At: 06:52 Publisher: Taylor & Francis Informa Ltd Registered in England and Wales Registered Number: 1072954 Registered office: Mortimer House‚ 37-41 Mortimer Street‚ London W1T 3JH‚ UK Polymer-Plastics Technology and Engineering Publication details‚ including instructions for authors and subscription information: http://www.tandfonline.com/loi/lpte20 Thermal‚ Dynamic Mechanical‚ and Barrier Studies of Potassium Permanganate-LDPE
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Calorimetry and Specific Heat Tessa Williams Chemistry 111 11/13/13 Abstract: In this experiment‚ the specific heat and the density of an unknown metal was determined in order to identify the unknown metal. The average specific heat of the unknown metal was 0.197˚C and was determined using a calorimeter. The density of the unknown metal was 6.57 g/mL and was determined using a cylinder and displacement. Using the specific heat value of the unknown metal and its density‚ it
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Objective: In the present study‚ an attempt was made to improve the bioavailability of Zidovudine by formulating into Orodispersible tablets‚ as it has poor bioavailability and extensive pre systemic metabolism. Methods: In the present study‚ the mucilage extracted from Fenugreek seeds (Trigonella foenum-graecum) was used as superdisintegrant. The oral dispersible tablets were prepared by using wet granulation technique. A three factor two level (23) central composite design was employed for the
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Summary These experiments were conducted to find the specific heat of a metal as well as the heat of solution of a solid. Both experiments required the use of calorimetry to measure heat flow and temperature change. The specific heat of the metal was found by heating it in boiling water before transferring it to the calorimeter that was partially filled with water. After shaking the calorimeter‚ the temperature change was measured and recorded. This information was used to calculate the specific
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Experiment 3: Resonance Energy of Naphthalene by Bomb Calorimetry Cameron Fowler CHEM 457: Lab Section 4 Submitted: 11/4/10 Lab Group #3: Michael Hyle Neil Baranik Tim Riley Abstract: The enthalpy of combustion of naphthalene was experimentally determined to be -5030.44 ± 78.98 kJ/mol which was a 2.5% error from the literature value of -5160 ± 20 kJ/mol.2 The theoretical enthalpy of combustion of solid naphthalene was calculated to be -6862.68 kJ/mol using bond energies for the gaseous
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