Calculate the enthalpy of the following reaction for the gas phase salts: Needed facts: K = Coulombs constant = 9.0 x 10° N-M2/C², q = charge on electron or proton depending on sign 1.6 x 10-19 Coulomb. The ionic radii in Angstroms 10-10 M are: Rb(+) = 1.66 Li(+) = 0.90 F(-) = 1.19 I(-) 2.06 %3D
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Use equation
V = (N)(q1)(q2)(k) / r
where k = 9.0x10^9
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- What is the Eh of a solution with 0.05 M Fe2+ and 0.0000002 M Fe3+ ? What is the Eh of a solution with 0.05 M Fe2+ and 0.05 M Fe3+? Standard Gibbs Free energies as follows... Fe3+……-8.56 Fe2+……-82.88This is all the information I was given.For water having a total alkalinity of 1.00x10^-3 mol/L and a pH of 10.34 what is the percentage contribution to alkalinity from CO32-? Please answer very soon will give rating surelyCalculate the E0 for the reaction between S2- and Fe3+ that yields SO42- and Fe2+. Standard Gibbs Free energies as follows... S2- …….85.9 Fe3+……-8.56 Fe2+……-82.88 So42-……-744.0 This was all the information I was given. Thank you for helping me understand!
- Table 2. Gibbs Free Energies of formation (kJ), ∆G°f, for Ions in 1M Solution and Ionic Solids Cations Cl--131.228 I--51.57 NO3--108.74 SO4-2-744.53 Ag+77.107 AgCl -109.789 -66.19 -33.41 -618.41 Calculated values of ∆G°rxn and the ∆Grxn of each box, Predicted results (ppt or no ppt).Observations (Rxn or No Rxn). S or support and R for Refute Cations Cl- I- NO3- SO4-2 Ag+ Ba+2Can precipitation give a confirmatory result on Group V cations: K, Na, and NH4?Given the solubility of ferrihydrite (Fe(OH)3) and goethite (FeOOH), with dissolution reactions shown below: [1] Fe(OH)3 3 H+ à Fe3+ + 3 H2O Ksp = 8.4 x 10^4 ∆ Gr0 = -28 KJ/mol Solubility of Fe(OH3) = 7.468 [2] FeOOH + 3 H+ à Fe3+ + 2 H2O Ksp = 8.8 x 10^-2 ∆ Gr0 = 6 KJ/mol Solubility of FeOOH = 0.353 QUESTION: [A] How much Fe3+ from ferrihydrite would dissolve at pH 2 ? [B] How much Fe3+ from ferrihydrite would dissolve at pH 7 ? [C] How much Fe3+ from goethite would dissolve at pH 2 ? [D] How much Fe3+ from goethite would dissolve at pH 7 ?
- ) What amperage is required to plate out 0.250 mol Cr from a Cr3+ solution in a period of 8.00 h?Use the thermodynamic quantities given below to calculate the theoretical ΔH for this reaction: NH3 + HCl → NH4Cl ΔH°f for NH3 (aq) = - 80.29 kJ/mol ΔH°f for HCl (aq) = - 167.2 kJ/mol ΔH°f for NH4+ (aq) = - 132.5 kJ/mol ΔH°f for Cl- (aq) = - 167.2 kJ/mol I found this answer to be -52.21 kJ/mol 6. What is the percent error of experimental results when using the theoretical value calculated in Question 5? I need help finding thisUse the thermodynamic quantities given below to calculate the theoretical ΔH for this reaction: NH3 + HCl → NH4Cl ΔH°f for NH3 (aq) = - 80.29 kJ/mol ΔH°f for HCl (aq) = - 167.2 kJ/mol ΔH°f for NH4+ (aq) = - 132.5 kJ/mol ΔH°f for Cl- (aq) = - 167.2 kJ/mol I found this answer to be -52.21 kJ/mol 6. What is the percent error of experimental results when using the theoretical value calculated in Question 5? I need help finding this please
- For biological and medical applications it is often necessary to consider proton transfer equilibria at body temperature (37 °C). The value of Kw for water at body temperature is 2.5 x 10-14 (a) What are the va lue of [H3O+) and the pH of neutral water at 37 °C. (b) What is the molar concentration ofOH- ions and the pOH of neutral water at 37 °C?Prepare 1.0 L of a 50.00 ppm iron solution from the solid Fe(NH4)2(SO4)2 of the80.0% purity. Clearly describe how to prepare this solution. If doneChlorimetric iron analysis using the calibration curve method, specify theform of preparation of 100.0 ml of each of the following standard solutions withcontents of 1.00, 5.00, 15.00 and 20.00 ppm of Fe respectively from the solutionmother (It suppose that the answers are: 0.3180, 2.00, 10.00, 20.00, 30.00 and 40.00 ml of the mother solution and dilute exactly to 100.0 mL with deionized water)Use the thermodynamic data given below to compute the formation constant, Kf for [Zn(NH3)4]2+ in aqueous solution at 337.0 K. Species ΔfH0kJ/mol S0J/mol/K NH3(aq) -80.29 111.3 Zn2+(aq) -153.89 -112.1 [Zn(NH3)4]2+(aq) -533.5 301 Include 3 significant figures