Mass of magnesium oxide used (g) Mass of inner cup and solution (g) Mass of empty inner cup (g) Mass of solution (g) Initial temperature of solution (°C) Temperature (°C) after 30 seconds 60 seconds 90 seconds 120 seconds 150 seconds 180 seconds Final temperature of solution (°C) Molar enthalpy of reaction (kJ mol¹) Average AH (kJ mol¹) 3.210 52.456 4.623 21.4 26.4 27.1 28.2 28.2 28.1 28.0 3.010 52.050 4.623 21.0 25.7 26.4 27.7 28.5 28.5 28.5 2.890 53.000 4.500 20.0 24.8 24.8 24.9 24.6 24.5 24.4 2.910 53.000 4.500 20.0 23.7 23.8 24.0 24.2 24.4 24.6 Heat capacity of calorimeter (J/oC) Specific heat of solution (J/goC) 2.1 4.17

Mass of magnesium oxide used (g) Mass of inner cup and solution (g) Mass of empty inner cup (g) Mass of solution (g) Initial temperature of solution (°C) Temperature (°C) after 30 seconds 60 seconds 90 seconds 120 seconds 150 seconds 180 seconds Final temperature of solution (°C) Molar enthalpy of reaction (kJ mol¹) Average AH (kJ mol¹) 3.210 52.456 4.623 21.4 26.4 27.1 28.2 28.2 28.1 28.0 3.010 52.050 4.623 21.0 25.7 26.4 27.7 28.5 28.5 28.5 2.890 53.000 4.500 20.0 24.8 24.8 24.9 24.6 24.5 24.4 2.910 53.000 4.500 20.0 23.7 23.8 24.0 24.2 24.4 24.6 Heat capacity of calorimeter (J/oC) Specific heat of solution (J/goC) 2.1 4.17

Chemistry: Principles and Practice

3rd Edition

ISBN:9780534420123

Author:Daniel L. Reger, Scott R. Goode, David W. Ball, Edward Mercer

Publisher:Daniel L. Reger, Scott R. Goode, David W. Ball, Edward Mercer

Chapter12: Solutions

Section: Chapter Questions

Problem 12.4QE

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B. DETERMINATION Molarity of nitric acid, M Volume of nitric acid, mL Molarity of sodium hydroxide, M Volume of sodium hydroxide, mL Initial Temperature (°C) Temperature of mixture (°C) 30 10 30 60 90 120 150 180 210 29 28 27 26 25 Time (sec) 1.00 5.00 26.7 Temperature of mixture (°C) vs. Time (sec) 0 29.0 29.0 OF THE ENTHALPY OF REACTION OF NITRIC ACID AND SODIUM HYDROXIDE 1.00 10.00 Temperature of mixture (°C) 26.7 27.8 29.0 29.0 29.0 29.0 50 Final Temperature (°C) AT (°C) AH (J/mol) AH (kJ/mol) 100 Time (sec) 150 200
6. For the given data draw graph Hydrogen monochloride (HCI) Solubility Potassium Chloride (KCI) Solubility Temperature Solubility (g of HCI /100 mL of H20) (°C) Temperature Solubility (g of KCI /100 mL of H20) (°C) 85 27 10 78 10 30 20 71 20 33 30 66 30 36 40 62 40 39 60 55 60 46 80 49 80 52 100 42 100 58
B. MEASUREMENT OF AH OF NEUTRALIZATION 61.69 g Mass of HCl/H,0 solution 42.66 g Mass of NaOH solution 3 M Molarity of HCl 3 M- Molarity of NaOH 21.5 C Temperature of HCI/H,O solution, T, 24 C Temperature of NaOH, T, | 26 C Final temperature from graph, T; AT for HCl/H,O solution AT for NaOH solution Heat evolved by reaction Show your work for each calculation performed.