Calculate the mean activity coefficient y, for the Ba2+ and SO2 ions in a saturated solution of BaSO4 in 0.4 M K₂SO4, assuming the Debye-Hückel limiting law to apply O a. 172 Ob 00763 Oc. 0.00582 O d. 0.0263
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- Given: molality = 0.54, pH = 2.43, Using the given equation, estimate the mean activity coefficient of HCl using the given molality and pH. ?± = mean activity coefficient of H+ and Cl- ionsb = molality relative to the standard 1 molal bo.The mean ionic activity coefficient for 0.1 M H2SO4 is 0.265. Calculate the activity of H2SO4The equilibrium constant of the reaction 2 C3H6 (g) ⇌ C2H4(g) + C4H8(g) is found to fit the expression InK= -1.04-(1088 K)/T +(1.51 x 10-2 K2)/T2between 300 K and 600 K. (a) Calculate the standard reaction Gibbs energy at each temperature at 390 K and 410 K. (b) Use the van 't Hoff equation to determine the standard reaction enthalpy at 400 K. (c) Hence also calculate the standard reaction entropy at 400 K.
- Using activities, calculate the molar solubility of Mg(OH)2 (Ksp= 7.1E-12) in a sol'n that is 0.0333M of Na2SO4The table below provides data for the enthalpy and entropy of formation of compounds A and B at standard conditions (298 K) Compound DHfo (kJ mol-1) Sfo(J K-1mol-1) A –135.2 189.2 B –157.6 192.1 i) Calculate the standard Gibbs energy of formation for A and B. ii) Calculate the Gibbs energy change for the reaction A - B at standard conditions. iii) Calculate the enthalpy change for the reaction A - B at 350 K if the average heat capacity C0p = 42 J.K-1.mol-1.The equilibrium pressure of hydrogen H2 over solid uranium U and solid uranium hydride UH3 at 500 K is 139 Pa. Calculate the standard Gibbs energy of formation of UH3 (s) in the reaction: U(s) + 3/2 H2 (g) → UH3 (s) at 500 K. Hint: start with writing the equilibrium constant K expressed through activities that include pressure of gas. Examples are in class notes. Then, convert K to the standard Gibbs energy of the pertinent reaction.
- The reaction A(g) + B(g) ↔ C(g) + D(g) has ΔGrxn° = -28.62 kJ mol-1 and Kp = 0.63 at 980 °C. A rigid cylinder at that temperature contains 1.2 atm of A, 0.20 atm of B, 0.30 atm of C, and 0.27 atm of D. What is the reaction Gibbs energy?If the Ksp of AgI is 1.5 x 10–16 at 298 K, calculate ΔGr for the reaction of 5 mL of 0.20 M AgNO3(aq) with 5 mL of 0.20 M NaI(aq) at 298 K.Calculate the activity coefficient of K+ in 0.050 M KNO3. pls show the solution, thank u
- Calculate the activity coefficient of K+ in 0.050 M KNO3.KMnO4 and Na2C2O4 solutions were used in the reactions that took place in a back titration to determine the amount of H2O2 in a sample. Calculate the concentration of H2O2 in the sample (w / v) as% by making appropriate assumptions for the volumes and normality of all these solutions.The dissociation vapor pressure of a salt A2B(s) ⇌ A2(g) + B(g) at 367°C is 208 kPa but at 477°C it has risen to 547 kPa. For the dissociation reaction of A2B(s), calculate (i) the equilibrium constant, (ii) the standard reaction Gibbs energy, (iii) the standard enthalpy, and (iv) the standard entropy of dissociation, all at 422°C. Assume that the vapor behaves as a perfect gas and that ΔrH° and ΔrS° are independent of temperature in the range given.