Determining the Theoretical Heat of Neutralization Using Hess' Law AH® for HCl(aq), NaOH(aq), H2O(l), and NaCl(aq)...
Experiment - Enthalpy of Neutralization Use Hess' Law to Calculate the enthalpy of dissociation for chloroacetic acid. H (aq) + OH -> H2O (l) ΔHn(HCl) HC2H2ClO2(aq) + OH (aq) -> C2H2ClO2 + H2O (l) ΔHn(HC2H2ClO2) We used a strong acid, HCl as the limiting reactant and NaOH as the the excess. Weak acid: HC2H2ClO2 (aq) + H (aq) + C2H2ClO2 (aq) ΔHd(HC2H2ClO2) HCl: Average ΔHn = -59 KJ HC2H2ClO2: Average ΔHn = -61 KJ
a) Using the Hess Law and the thermochemical equations below, MgO(s) + + 2HCl(aq) ------> MgCl2(g) + H2O(l) ΔHrxn = -111.7 kJ/mol Mg(s) + 2 HCl(aq) ------> MgCl2(g) + H2(g) ΔHrxn = -548.3 kJ/mol H2(g) + 1/2 O2(g) ------> H2O(l) ΔHrxn = -142.9 kJ/mol find the heat of reaction of the following: Mg(s) + 1/2 O2(g) ------> MgO(g) ΔHrxn = ? b) If the theoretical enthalpy of this reaction is -602 kJ/mol, calculate the percent error
Data and Results: Part A M (HCI): Volume HCl(aq): Reaction 2: Heat of Neutralization M(NaOH) 50.0 mL (+0.5 mL) Volume NaOH(aq): 20, 9 °C Final Temperature: 6.7 (not from the data above) 1.0 50-0 ML (+0.5 mL) 27.6 °C Initial Temperature: AT (from plot) Mass of Solution: (show all calculations) Moles H*:(show all calculations) Moles OH :(show all calculations) 0.05 moles H 0.05 moles OH AH experimental: (show all calculations) kJ/mol AH (theoretical): (see page 8) (show all calculations) kJ/mol...
POST LABORATORY QUESTIONS 1. a. For the neutralization reaction that you carried out between HCl(aq) and NaOH (ag). how many moles of NaCl(aq) were produced? b. For the neutralization reaction that you carried out between HCl(aq) and NaOH() how many moles of NaCl(aq) were produced? 2. Calculate AHan for the neutralization of HCl(aq) and NaOH(aq) in kilojoules per mol of NaCl b. Calculate A Hexn for the neutralization of HCl (aq) and NaOH(s) in kilojoules per mol of NaCl 3....
Using the Hess Law and the thermochemical equations below, MgO(s) + + 2HCl(aq) ------> MgCl2(g) + H2O(l) ΔHrxn = -111.7 kJ/mol Mg(s) + 2 HCl(aq) ------> MgCl2(g) + H2(g) ΔHrxn = -548.3 kJ/mol H2(g) + 1/2 O2(g) ------> H2O(l) ΔHrxn = -142.9 kJ/mol find the heat of reaction of the following: (0.25 pt.) Mg(s) + 1/2 O2(g) ------> MgO(g) ΔHrxn = ? b) If the theoretical enthalpy of this reaction is -602 kJ/mol,...
create a procedure to determine the heat neutralization for the reaction between 1 M HCl and 1 M NaOH. create a data sheet which shows the calculations. Procedure Design your own procedure to determine the heat of neutralization for the reaction between 1.0 M HCl and 1.0 M NaOH. This procedure must be approved by your instructor before you can begin experimentation. It will most likely change as you work in lab. You will also need to decide what data...
Consider the following reaction. NaOH(aq) + HCl(aq) → NaCl(aq) + H2O(l) If 25.0 mL of a 0.100 M solution of NaOH reacted with excess HCl, how many moles of NaCl could form? a. 0.00250 mol b. 0.100 mol c. 25.0 mol d. 2.50 mol 1 points QUESTION 9 Consider the following reaction. How many grams of sucrose would produce 2546 kcal? a. 649.4 g b. 1342 g c. 180.4 g d. 1.897 g
QUESTION 1 Heat is required to dissolve NaOH(s) in water. A-True B-False -------------------- QUESTiON 2 The below equation represents an exothermic reaction: Reactants + delta H ----> product ATrue B-False -------------------- QUESTION 3 The Styrofoam cup was used as an insulated device that allows heat loss A-True B-False -------------------- QUESTION 4 The following is an endothermic reaction; NaOH+ HCI------> NaCl+H2O+42.12KJ A-True B-False -------------------- QUESTION 5 NaOH(s)---> Na^+(aq)+CH^-(aq)+44.02kJ Calculate the amount (in moles) of NaOH needed to make the reaction above...
THe enthalpy of neutralization of HCN (aq) with NaOH (aq) is -12.0 kJ/mol. Using your value for the enthalpy of neutralization of H+(aq) with OH-(aq) and the technique used in question 2, determine the enthalpy of ionization of HCN. Compare the relative amounts of ionization of HCL and HC2H3O2. Which is the stronger acid? Question 2. The neutralization of HC2H3O2 (aq) by NaOH(aq) (part C) can be considered to be the sum of the neutralization of H+(aq) by OH-(aq) (part...
Prelab questions 1. What is the significance of the statement "qsystem + Surroundings zero Law of Thermodynamics"? statement "qsystem + Surroundings = zero" in relation to the First 2. A student measured heat of neutralization in a Styrofoam "Coffee Cup calorimeter by mixing 25.0 mL of 1.0 M NaOH solution with 250 mL of 10 M HCI solution. Write the balanced equation and identify the limiting reactant in this experiment. If heat of this exothermic reaction was determined to be...