Part A - AHfor Hydrochloric Acid reacting with Aqueous Sodium Hydroxide.PART A - AHfor Hydrochloric Acid reacting with aqueous Sodium Hydroxide.For students with student numbers ending in 1, 2, 4, 5, 7, 8, or 0.Type of calorimeter used: M whiteO transparentO blue(see page 96)NaOH(aq) + HСКаq) —> NaCЦаq) + Hz0()Concentration of HCl(aq):1.00 mol/LConcentration of NaOH(aq): 1.00 mol/Lorон (аq) + H'(aq) > Н200)Elapsed time / min0.51.01.52.02.51.Clean and dry the calorimeter.Temperature of aqueous NaOH / °C23.623.623.723.723.723.72.Dispense 60 mL of the standardised sodium hydroxide solution directly into the dry, clean calorimeter.3.Dispense 50 mL of the standardised hydrochloric acid directly into a clean, dry beaker. Record in pen the exactconcentration of the acid used onto your results page.Elapsed time / min3.03.54.04.55.05.54.Temperature of HCI / °C23.823.823.823.823.723.7Starting timing (preferably using a stopwatch on a phone or tablet, or a real watch) and measure and record to 0.1 °Cthe temperature of the sodium hydroxide solution at 0.5 minute intervals for a total of 6 measurements. Wash and dryElapsed time at mixing = 6.0 min (it is important to mix the solutions al exactly 6.0 minules and then stir thoroughly.)the thermometer. Next, measure and record the temperature of the hydrochloric acid solution at 0.5 minute intervals fora total of 6 measurements.Elapsed time / min6.57.07.58.08.59.09.510.010.511.0At time = 6.0 minutes (exactly, not earlier, not later), add the hydrochloric acid solution to the sodium hydroxide solutionin the calorimeter. Mix well using a stirring rod or spatula and stir the solution for 15 seconds.5.Temp. of mixture / °C28.629.529.429.329.229.129.029.028.928.8Caution: Do not use the thermometer to stir the solution.Calculation of Enthalpy of Neutralisation6.At time = 6.5 minutes, (and at further 0.5 minute intervals), measure the temperature of the solution. Stir the solutionInclude units for all quantities you calculate. Keep intermediate results in your calculator to avoid round-off error and reporttheir values with 2 or 3 extra non-significant digits. Report the final molar enthalpy change with an appropriate number ofsignificant digits.between the temperature measurements. Continue to measure the temperature until a steady decrease in temperature isnoted or until time = 11.0 minutes.Note: In order to obtain a smooth temperature curve you must stir the solution continuously between temperaturemeasurements and keep the thermometer in the solution the whole time.1.Use the total volume of solution and its density to calculate the mass of the final solution:Rinse (under the tap) the temperature probe on the thermometer and dry it.Volume of final solution/mL =Density = 1.02 g mL at 20 °C7.8.Obtain a piece of blue litmus paper and a piece of red litmus paper. Transfer a drop of the final solution onto both piecesMass of final solution =of litmus paper. Use the colours to determine whether the resultant solution is acidic or basic and record this in your2.Use the mass of the final solution, AT, and the specific heat capacity of the solution to calculate the heat absorbed by thereport.solution.9. Graph the results on the results page. Be sure to allow sufficient range on the temperature axis so that the temperatureat the time of mixing fits on the graph.- 4.04 J g KMass of final solution /g =10. Extrapolate your lines to the time of mixing (time = 6.0 minutes) and determine the change in temperature as shown onthe graph in the introduction.Heat absorbed by solution =11. Calculate the enthalpy change for the reaction by completing the calculations in the results pages.

We need to determine the heat absorbed by the solution, and molar its enthalpy change.

Include units for all quantities you calculate. Keep intermediate results in your calculator to avoid round-off error and report their values with 2 or 3 extra non-significant digits. Report the final molar enthalpy change with an appropriate number of significant digits. 1. Use the total volume of solution and its density to calculate the mass of the final solution: Density = 1.02 g ml. at 20 °C Volume of final solution/mL = Mass of final solution = 2. Use the mass of the final solution, AT, and the specific heat capacity of the solution to calculate the heat absorbed by the solution. Mass of final solution /g = Heat absorbed by solution=

Include units for all quantities you calculate. Keep intermediate results in your calculator to avoid round-off error and report their values with 2 or 3 extra non-significant digits. Report the final molar enthalpy change with an appropriate number of significant digits. 1. Use the total volume of solution and its density to calculate the mass of the final solution: Density = 1.02 g ml. at 20 °C Volume of final solution/mL = Mass of final solution = 2. Use the mass of the final solution, AT, and the specific heat capacity of the solution to calculate the heat absorbed by the solution. Mass of final solution /g = Heat absorbed by solution=

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

See similar textbooks

Similar questions

in text form with proper workings and explanation for each and every part and steps with concept and introduction no AI no copy paste remember answer must be in proper format with all working!!!!!!!
Calculate the solubility of CuBr in water at 25 °C. You'll find Ksp data in the ALEKS Data tab. Round your answer to 2 significant digits. 凵 L 口

Given these values, find the initial mole fraction and initial mass % of the solute (Sucrose) Solvent (water) weight: 329g Solute (sucrose) weight: 232g Solute (sucrose) Molar mass=342.3 moles of solute (sucrose) = .678
Given: Mass of lauric acid (g): 8.000g Mass of benzoic acid (g): 1.027g Freezing temperature of pure lactic acid(°C): 43.3°C Freezing point of the benzoic acid-lauric acid mixture(°C): 39.8°C m of lauric acid: 1.8m Mols of benzoic acid solute: .0072mol Question: Calculate the experimental molecular weight of benzoic acid, in g/mol.
Il Connected to DESKTOP-VKHKVG3 "Hot ice" releases heat when the crystals form because A. the enthalpy of solution for solid sodium acetate is endothermic Disconnect C. the enthalpy of solution for solid sodium acetate is exothermic B. the precipitation of sodium ac crystals is exothermic D. A and B are true
Given: Mass of lauric acid (g): 8.000g Mass of benzoic acid (g): 1.027g Freezing temperature of pure lactic acid(°C): 43.3°C Freezing point of the benzoic acid-lauric acid mixture(°C): 39.8°C Question: Calculate molality (m,) in mol/kg, using the formula ΔTf = m × Kf. The Kf value for lauric acid is 3.9°C x kg/mol.
Given these values, find the initial mole fraction and initial mass % of the solute (NaCl) Solvent (water) weight: 200g Solute (NaCl) weight: 39g Solute (NaCl) Molar mass=58.44 moles of solute (NaCl) = .667
What is true about the miscibility of water and cyclohexane?
Two 1-L beakers, A and B, each containing a different aqueous solution of fructose (a nonvolatile sugar with MW = 180.16 g/mol) are placed together in a box, which is then sealed. The temperature remains constant at 20 °C. Initially, there is 220 mL of solution in A and 650 mL of solution in B. As the solutions stand in the sealed box, their volumes change slowly for a while. When they stop changing, beaker A contains 430 mL and beaker B contains 440 mL. It is then determined that the solution in A is 1.74 M in fructose and has a density of 1.12 g mL-¹. (a) What is the molar concentration of fructose in the solution in beaker B at the end? M (b) Calculate the concentration of fructose in the solution in A at the start. M (c) Calculate the concentration of the fructose in the solution in B at the start. M (d) The vapor pressure of pure water at 20 °C is 17.5 torr. What is the pressure of water vapor in the box at the end, after the volumes have stopped changing? torr