Equilibrium questions
1777 published questions with worked solutions.
- The pK_a of a weak acid, HA, is 4.80. The pK_b of a weak base, BOH, is 4.78. The pH of an aqueous solution of the corresponding...
- Solid Ba(NO_3)_2 is gradually dissolved in a 1.0 10^ -4 MNa_2CO_3 solution. At what concentration of Ba^ 2+ will a precipitate...
- In aqueous solution the ionization constants for carbonic acid are K_1 = 4.2 10^ -7 and K_2 = 4.8 10^ -11 . Select the correct...
- Solubility product of silver bromide is 5.0 10^ -13 . The quantity of potassium bromide (molar mass precipitation of AgBr is
- At 25°C, the solubility product of Mg(OH)_2 is 1.0 10^ -11 . At which pH, will Mg^ 2+ ions start precipitating in the form of...
- Three reactions involving H_2PO_4^- are given below : (i) H_3PO_4 + H_2O H_3O^+ + H_2PO_4^- (ii) H_2PO_4^- + H_2O HPO_4^ 2- +...
- The degree of dissociation (α) of a weak electrolyte, A_xB_y is related to van't Hoff factor (i) by the expression:
- On adding 20 mL of 0.1 N NaOH solution to 10 mL of 0.1 N HCl, the resulting solution will:
- Conjugate base for Bronsted acids H_2O and HF are
- Which of the following cannot act both as Bronsted acid and as Bronsted base?
- Which equilibrium can be described as an acid-base reaction using the Lewis acid-base definition, but not using Bronsted-Lowry...
- The correct order of increasing [ H_3O^+ ] in the aqueous solution is
- The concentration of hydrogen ion in a sample of soft drink is 3.8 10^ -3 , M . The value of its pH is
- If the ionisation constant of acetic acid is 1.8 10^ -5 , at what concentration will it be dissociated to 2% ?
- The dissociation constant of acetic acid at a given temperature is 1.69 10^ -5 . The degree of dissociation of 0.01 M acetic acid...
- A 0.2 molar solution of formic acid is 3.2% ionised. Its ionisation constant is
- For a reaction, CH_3COOH(aq) H^+(aq) + CH_3COO^-(aq) or HAc(aq) H^+(aq) + Ac^-(aq) The value of pH of the solution resulting on...
- The pH of 0.10 N acetic acid having K_a = 1.8 10^ -5 is
- A 0.01 M ammonia solution is 5% ionised. The concentration of OH^- ion is
- 2 g of NaOH is dissolved in water to make 1 L solution. The pH of solution is
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