Equilibrium questions
1777 published questions with worked solutions.
- Identify conjugate acid and conjugate base for HCO_3^- ion respectively
- Find the concentration of sodium acetate when added to 0.1 M solution of acetic acid to form a buffer solution of pH = 5.5? (pK_a...
- What is degree of dissociation of CH_3COOH if ^ (CH_3COO^-)=50 S ,cm^2mol^ -1 , ^ (H^+)=350 cm^2mol^ -1 and molar conductivity of...
- Calculate the ionization constant of 0.08 mol dm^ -3 of a monobasic acid having pH = 2
- The solubility (in mol L^ -1 ) of AgCl (K_ sp = 1.0 10^ -10 ) in a 0.1MKCl solution will be
- K_1, K_2 and K_3 are the equilibrium constants of the following reactions (I), (II) and (III) respectively: (I) N_2 + 2O_2 2NO_2...
- 8 mol of AB_3(g) are introduced into a 1.0dm^3 vessel. If it dissociates as 2AB_3(g) A_2(g) + 3B_2(g). At equilibrium, 2 mol of...
- Given (i) HCN(aq) + H_2O(l) H_3O^+(aq) + CN^-(aq) K_a = 6.2 10^ -10 (ii) CN^-(aq) + H_2O(l) HCN(aq) + OH^-(aq) K_b = 1.6 10^ -5 ....
- The value of K_p for the equilibrium reaction N_2O_4(g) 2NO_2(g) is 2 . The percentage dissociation of N_2O_4(g) at a pressure of...
- If K_ sp of CaF_2 at 25°C is 1.7 10^ -10 , the combination amongst the following which gives a precipitate of CaF_2 is
- One mole of O_ 2(g) and two moles of SO_ 2(g) were heated in a closed vessel of one-litre capacity at 1098 K. At equilibrium 1.6...
- The solubility of PbI_2 at 25°C is 0.7 g L^ -1 . The solubility product of PbI_2 at this temperature is (molar mass of PbI_2 =...
- The equilibrium constant (K_c) for the reaction N_2(g) + O_2(g) 2NO(g) at temperature T is 4 10^ -4 . The value of K_c for the...
- The pH of a 0.1 molar solution of the acid HQ is 3 . The value of the ionization constant, Ka of this acid is :
- How many litres of water must be added to 1 litre of aqueous solution of HCl with a pH of 1 to create an aqueous solution with pH...
- In reaction A + 2 B ⇌ 2C + D, initial concentration of B was 1.5 times of [A], but at equilibrium the concentrations of A and B...
- Which one of the following arrangements represents the correct order of solubilities of sparingly soluble salts Hg_2Cl_2,...
- NaOH is a strong base. What will be pH of 5.0 10^ -2 MNaOH solution ? (log 2 = 0.3)
- What is the pH of a 10^ -4 MOH^- solution at 330 K, if K_w at 330 K is 10^ -13.6 ?
- Equimolar solutions of the following compounds are prepared separately in water. Which will have the lowest pH value ?
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