Question

How do you do these problems? I got all of them wrong and don't understand why.

- 10. Which of the changes will increase the value of K, for the reaction? 2 SO2(g) + O2(g) - 2 SO3(g) AH = -200 kJ/mol A. Lowering the temperature B. Increasing the pressure (CCAdding 02 D. Removing SO,

Answer 1

Q.10. Answers 2002 (9)+ 0269) 4 2 503 (9). SHE -200 kJ/mol. The Ke for the above reaction is - Ke=-_[303]? [502]å [0,75 : Ke - [product.ją TReactant] B This is an endothermic reaction as th=-ve. . So, Lowering the temperature will lead the equilli briună backward, hence ke decreases. :: option dA) is incorpeet. Oor inepersing the pressure, the equillibríum will shifted towards the forcoward direction as there is less number of moles of compound in produet side. si Ke increases as equillibrium shifting towards the foroward direction, si option (B) is compeet From the Ke equation there is a inversely proportional relationship with Ke and [02]. :: Increasing or adding 02 will . decrease ke - option (C) is incoroneet again, Re and [502] has deseetly proportional relationship. ;; decreasing or removing so, will decrease the value of ke, a .; Option (D) is also incorrect

9.3. NaNO2 + H20 z NaOH + HNO2- as Naoh is strong electrolyte made up of Nat) and OHQ hence, there will be 200 formation of equilibrium with Nat Hence; Noze will have equilibrium with. HNOZ as follows reaction - NO2O +H20 - HNO2 + oHo. because. HNO2 is weak electrolyte. We know, equillibriumi established in . case g wear electrolyte. -; option (c). No, @ + H20 F HNO2+ oHe. is correct option: Nole: - Do not confuse in option (e) and (), option (D) is just the reverse Heaction and incorrect an initially Nogº is present 04. HNE +H20 = tho® + Nze Ka = 1.9x10-5 = [H3O+] [N3] [HN3] [H20] T D120]-unity 109x10-5 = [H30+) [Mş®] [HN37 do Ka value is less than 1,.; denominator leon [HN3] will be greater - option (e) is conreet option. 2.17. Molality(m) = number of motes of solute. Mass og cotrent (kg.) From volume , we can find mass using density. •: dption.(D). density solvent is correct option: Remembey: - In formula u Mass of solren