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Which of the following has highest pH?
The number of H+ in 1 cc of solution of pH = 13 is
The solution of hydrochloric acid has pH = 4, the molar strength of this solution is
Calculate the OH– ion concentration of NaOH of which pH is 12.
Four grams of NaOH solid are dissolved in just enough water to make 1 litre of solution. What is the [H+] of the solution ?
The pOH value of a solution whose hydroxide ion concentration is 6.2 × 10–9mol/litre is
4g of NaOH are put into 10 litres of water. The pH of the resulting solution will be
The pH of solutions A, B, C, D are respectively 9.5, 2.5, 3.5, 5.5, The most acidic solution is
] ] In option B, it is a base salt. In option C, it is a weak acid salt. In option D, it is a strong acid
Which of the following solutions will have the highest pH value ?
A soda water bottle has pH
The term pH comes from
w 2H O H O OH ,K 1 10 x at 25ºC hence Ka is : (a) 1 10 x (b) 5.55 10 x (c) 18 10 x (d) 1.00 10 x
The concentration of [H+] and concentration of [OH–] of a 0.1 aqueous solution of 2% ionised weak monoprotic acid is [ionic product of water = 1×10–14]
At 90oC, pure water has H3O+ ion concentration of 10-6 mol/L. The Kw at 90oC is
The hydrogen ion concentration of a 10–8 M HCl aq. solution at 298K (Kw = 10–14) is (a) 1.0 10 M x (b) 1.10 10 M x (c) 9.525 10 M x (d) 1.0 10 M x
The concentration of water molecules in pure water at 298 K is
For a pure water,
A monoprotic acid in 1.00 M solution is 0.01% ionized. The dissociation constant of this acid is (a) 1 10 x (b) 1 10 x (c) 1 10 x (d) 1 10 x
At infinite dilution, the percentage ionisation for both strong and weak electrolytes is
Concentration CN – in 0.1 M HCN is [Ka = 4 × 10 –10]
For a weak acid HA, Ostwald’s dilution law is represented by the equation (a) a c K 2 (b) a c K (c) a K c c (d) a c K
The a K of an acid is 3.2 10 x . The degree of dissociation of the acid at concentration of 0.2M is (a) 6.0 10 x (b) –2 1.26 10 x (c) –4 x (d) 0.04 10 x
The hydrogen ion concentration of 0.2 N CH3COOH which is 40% dissociated is
Aqueous solution of acetic acid contains