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8) Consider the gas-phase equilibrium system represented by the equation:                                                                                               2H2O (g) + Heat      2H2(g) + O2(g)           [Hint = The reaction is Endothermic] Given that the forward reaction is endothermic, which of the following changes will decrease the equilibrium amount of H2O(g)?

22) Which of the following combinations cannot produce a buffer solution? HNO2 and NaNO2 HCN and NaCN HClO4 and NaClO4 NH3 and (NH4)2SO4

33) A solution made by dissolving 9.81 g of a nonvolatile nonelectrolyte in 90.0 g of water boiled at 100.37 o C at 760 mm Hg. What is the approximate molecular weight of the substance? (For water, Kb = 0.51 o C/m)    [DTb = Kb * m]                                                       

13) Consider the following reaction mechanism: Step1:  I–Cl  +   H2     →    H–I  +  HCl  (Slow)                                     Step 2:  I–Cl  +   H–I   →  HCl  +  I2     (Fast) The species HCl _________ while H–I _________________.

28) Complete the statement to give a correct answer. The stronger the acid, __________

16) If the rate law for the overall reaction [2A + 3B → Products] is first order in A and second order in B, then the rate law for this reaction is____

21) Consider the following equilibrium:                                           Which of the following changes will cause the equilibrium to shift to the left?                 2SO3(g)  Arrow(1).png 2SO2(g) + O2(g)    à  [DHº = +198 kJ]

25) What is the coefficient of the permanganate ion (MnO4-1) on the reactant side when the following equation is balanced? How many electrons are being transferred when Mn in permangnate ion (MnO4-1 ) is being reduced to Mn+2?                        MnO4-1 + Br-1 → Mn+2 + Br2   (acidic solution)

38) What is the pH of a solution prepared by dissolving 0.35 mol. of solid methylamine hydrochloride (CH3NH3Cl) in 1.00 L of 1.1 M methylamine (CH3NH2)? The pKa for methylamine (CH3NH2) is 10.64.

6)Phase diagrams are used to depict changes in the properties of solutions. Below is the phase diagram of a polar solution.Question 24(2).png  What processes are occurring at point D? Condensation and vaporization Deposition and sublimation Freezing and melting