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Heat of Neutralization = Q/moles of limiting reactant = Q/moles of NaOH titrated at neutralization = Q/(Molarity of NaOH x volume of NaOH (in litres))

Heat of Neutralization = Q/moles of limiting reactant = Q/moles of NaOH titrated at neutralization = Q/(Molarity of NaOH x volume of NaOH (in litres))

Chemistry: Principles and Reactions
Chemistry: Principles and Reactions
8th Edition
ISBN:9781305079373
Author:William L. Masterton, Cecile N. Hurley
Publisher:William L. Masterton, Cecile N. Hurley
Chapter14: Equilibria In Acid-base Solutions
Section: Chapter Questions
Problem 61QAP: Each symbol in the box below represents a mole of a component in one liter of a buffer solution;...
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I I II1 III I II III 5 I I I II 6 I Step 1: Obtain a calorimeter from the Equipment menu. Step 2. Select the calorimeter and add 25 ml of 1M HCl using the Chemicals dialog box. Step 3. Obtain a 50 ml buret from the Equipment menu. Step 4. Select the buret and fill with 50 ml of 1 M NAOH, using the Chemicals dialog box. 14 13 12 11 10 34 33 32 Step 5. Select the calorimeter and add a pH meter from the |Equipment menu – this will appear as a pH label below the calorimeter. 31 9 30 29 28 27 26 25 |24 23 22 21 20 Step 6. Select the calorimeter and turn-on the collection of titration data using the Procedure menu for Collect Titration pH Data. 7 Step 7. Select View Titration Data from the Procedures menu. Step 8. Start titrating the NaOH into the calorimeter, you should see a plot of “ml(s) titrate" vs pH and temperature in the Titration Data window. Step 9. Titrate all the NaOH into the calorimeter – note the point at which the temperature reaches it maximum. 10 15 20 25 30 35 40 45 Volume titrated (ml) Step 10. Record your observations.
Transcribed Image Text:I I II1 III I II III 5 I I I II 6 I Step 1: Obtain a calorimeter from the Equipment menu. Step 2. Select the calorimeter and add 25 ml of 1M HCl using the Chemicals dialog box. Step 3. Obtain a 50 ml buret from the Equipment menu. Step 4. Select the buret and fill with 50 ml of 1 M NAOH, using the Chemicals dialog box. 14 13 12 11 10 34 33 32 Step 5. Select the calorimeter and add a pH meter from the |Equipment menu – this will appear as a pH label below the calorimeter. 31 9 30 29 28 27 26 25 |24 23 22 21 20 Step 6. Select the calorimeter and turn-on the collection of titration data using the Procedure menu for Collect Titration pH Data. 7 Step 7. Select View Titration Data from the Procedures menu. Step 8. Start titrating the NaOH into the calorimeter, you should see a plot of “ml(s) titrate" vs pH and temperature in the Titration Data window. Step 9. Titrate all the NaOH into the calorimeter – note the point at which the temperature reaches it maximum. 10 15 20 25 30 35 40 45 Volume titrated (ml) Step 10. Record your observations.
File Edit View Insert Format Tools Add-ons He Introduction Procedure Observation Observations: 100% 1 2 I 3 I 4 Initial solution temperature (°C): 20.8°C Maximum solution temperature (°C):27°C Recall that the steepest point on the pH curve occurs at the equivalence point, that is, when the acid is exactly neutralized. Total volume of NaOH titrated to reach end-point or neutralization (steepest point on the pH curve):25ml 14 13 Mass of solution (g) = (Volume of NaOH titrated (ml) + Volume of HCl (ml)) x density Mass of solution = 76 g 34 32 31 30 29 Note: Assume a density of 1.038 for both NaOH and HCI 11 10 pH Heat released by neutralization: 27 Q = mcAT Q = 1.9 x 10^3 J 25 where m is the mass solution in grams, c = specific heat capacity of our solution (=4.184 J/°C g) and AT=T, max 23 22 21 20 Tinitial- Heat of Neutralization = Q/moles of limiting reactant Q/moles of NaOH titrated at neutralization Q/(Molarity of NaOH x volume of NaOH (in litres)) 10 15 20 25 30 35 40 45 %3D Volume titrated (ml) Temp °C CO LO T MS M 33♡ 3 ÑÑ NÑÑN ÑÑNN -으2 으9876543210
Transcribed Image Text:File Edit View Insert Format Tools Add-ons He Introduction Procedure Observation Observations: 100% 1 2 I 3 I 4 Initial solution temperature (°C): 20.8°C Maximum solution temperature (°C):27°C Recall that the steepest point on the pH curve occurs at the equivalence point, that is, when the acid is exactly neutralized. Total volume of NaOH titrated to reach end-point or neutralization (steepest point on the pH curve):25ml 14 13 Mass of solution (g) = (Volume of NaOH titrated (ml) + Volume of HCl (ml)) x density Mass of solution = 76 g 34 32 31 30 29 Note: Assume a density of 1.038 for both NaOH and HCI 11 10 pH Heat released by neutralization: 27 Q = mcAT Q = 1.9 x 10^3 J 25 where m is the mass solution in grams, c = specific heat capacity of our solution (=4.184 J/°C g) and AT=T, max 23 22 21 20 Tinitial- Heat of Neutralization = Q/moles of limiting reactant Q/moles of NaOH titrated at neutralization Q/(Molarity of NaOH x volume of NaOH (in litres)) 10 15 20 25 30 35 40 45 %3D Volume titrated (ml) Temp °C CO LO T MS M 33♡ 3 ÑÑ NÑÑN ÑÑNN -으2 으9876543210
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