|(Mg) | | |Trial 1 |Trial 2 |Trial 1 |Trial 2 | |Volume of 1.00 M HCl |50.0 mL ± 0.5 mL |50.0 mL ± 0.5 mL |50.0 mL ± 0.5 mL |50.0 mL ± 0.5 mL | |Final temperature‚ t2 |28.9(C ± 0.1(C |28.8(C ± 0.1(C |44.8(C ± 0.1(C |44.4(
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accomplish this the experiment was split into two parts; part A and Part B. in Part A of the experiment a standardized 0.05 M solution of HCl was titrated into a 25 mL solution of saturated Ca(OH)2 which contained 2 drops of orange methyl identifier. Once the titration began‚ the HCl was added until the methyl orange endpoint was reached‚ and as a result the volume of the HCl needed for the endpoint to be reached could be used in determining the moles and in turn the molar solubility and the solubility constant
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Analysis of Soda Ash and Carbonate-Bicarbonate Mixture Submitted: February 27‚ 2013 Department of Chemical Engineering‚ Faculty of Engineering University of Santo Tomas España‚ Manila Abstract A standard acid solution like HCl can be used as titrant for the analysis of both soda ash and a carbonate-bicarbonate mixture. In the analysis of soda ash‚ the volume needed to neutralize the soda ash is used to compute for its alkalinity‚ in this experiment we obtained a 17.6 % alkalinity with an error
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Summary The Project entitled “A Study on customer perception and effectiveness of student’s scheme on sale of laptop in Bangalore” with reference to HCL Infosystems was conducted in partial fulfillment of the Post Graduate Diploma in Management. The Study was undertaken with the objective of: Analyzing the customer perception regarding HCL Laptops and finding out the effectiveness of students scheme on sale of Laptops. The study has also taken into consideration the key demand drivers‚ and
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/ 63.54 g Cu = 0.00097 mol Cu 5. Write a balanced reaction of zinc with HCl. - Zn (s) + 2HCl (aq) ZnCl2 (aq) + H2 (g) 6. How many moles of HCl are needed to react completely with all of the zinc in a post 1982 penny? (2.43 g Zn x 1 mol) / 65.38 g Zn = 0.037 mol Zn (0.037 mol Zn x 2mol HCl) / 1 mol Zn = 0.074 mol HCl is needed 7. In a procedure developed to determine the percent zinc in post 1982 pennies‚ 50 ml of an HCl solution was used to react (dissolve) all of the zinc in the penny. To ensure
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If the temperature of an exothermic equilibrium system is increased‚ the equilibrium position shifts to use up the heat by producing more reactants. III. Materials: Reagents: Apparatus: * 0.4 M CoCl2 ő graduated cylinder * 0.5 M HCl ő
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alkalinity of the unknown soda ash sample was determined by titrating it with standard HCl solution. After three trials‚ the researchers obtained an average percent alkalinity of 33.20% that resulted to a percent error of 12.63%. The percentage of carbonate and bicarbonate of the same unknown soda ash sample was also determined in the experiment‚ following the same procedures and using the same titrant that is the standard HCl solution; however‚ this time‚ the researchers made use of a pH meter. Subsequently
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Variables: Manipulated - Concentration of HCl Responding - Reaction time of HCl and Mg Controlled - Size of Mg piece‚ amount of HCl in test tube‚ room temperature‚ method of agitation. Materials List: 1. Test tube rack 2. Graduated Cylinder (10mL) 3. 3 Test Tubes 4. 50 mL beaker 5. 250 mL flask (for the HCl) 6. Dropper 7. Stopwatch 8. 17cm strip of Magnesium Ribbon 9. HCl (.5 molarity) 10. HCl (1 molarity) 11. HCl (2 molarity) 12. Goggles 13. Scissors/Knife (for cutting Mg)
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determine the weight % of Na2CO3 through the preparation of NaOH and HCl standards. The molarity of the standards will be found through titration of KHP for NaOH‚ HCl vs the known NaOH‚ and the unknown Soda Ash sample vs the known HCl. II. Equations and Sample Calculations: Titration of HCl with NaOH: Complete Equation: HCl (aq) + NaOH (aq) H2O (l) + NaCl (aq) Net Ionic Equation: H+ + OH- H2O(l) Calculations (10mL 0.1M HCL‚ 100mL H20‚ 7.8mL NaOH): # mols NaOH = 0.1M (known concentration)
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Ocean acidification is the continuous reduction of the ocean’s pH‚ carbonate ion concentration‚ and saturation states of biological calcium carbonate minerals. Ocean acidification is caused by the uptake of carbon dioxide from the atmosphere. According to “Ocean Acidification: The Other CO2 Problem‚” after the industrial revolution‚ carbon dioxide levels in the atmosphere has increased nearly 40%‚ primarily due to the burning of fossil fuels and deforestation (Doney S. 2009). The increase of
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