19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
A certain buffer solution contains equal concentration of Xand HX. The Kb for X is 10–10. The pH of the buffer is
Calculate the pH of a buffer prepared by mixing 0.10 mol of sodium formate and 0.05 mole of formic acid in 1.0 L of solution. [HCO2H : Ka =1.8 × 10–4]
What is the pH of a buffer solution which is 0.250 M in benzoic acid, C6H5COOH, and 0.150 M in sodium benzoate, C6H5COONa, if a K for benzoic acid is 6.5 × 10–5 ?
The principal buffer present in human blood is
For preparing a buffer solution of pH 6 by mixing sodium acetate and acetic acid, the ratio of the concentration of salt and acid should be (Ka = 10 –5)
The pKb of CNis 4.7. The pH of solution prepared by mixing 2.5 mol of KCN of 2.5 mol of HCN in water and making the total volume up to 500 mL is
10–6 M NaOH is diluted by 100 times. The pH of diluted base is
K C K /C x xx a H
The pH of 0.5 M aqueous solution of HF (Ka = 2 × 10–4) is
In decimolar solution, CH3COOH is ionised to the extent of 1.3%. If log 1.3 = 0.11, what is the pH of the solution ?
At a certain temperature the value of pKw is 13.4 and the measured pH of solution is 7. The solution is
What is the pH of a 0.015 M Ba(OH)2 solution ?
An acid solution of pH = 6 is diluted hundred times. The pH the solution becomes :
A is an aqueous acid; B is an aqueous base. They are diluted separately, then
The pH of a 0.1 M aqueous solution of a weak acid (HA) is 3. What is its degree of dissociation ?
What will be the pH of a solution formed by mixing 40 ml of 0.10 M HCl with 10 ml of 0.45 M NaOH
x x
What will be the pH of the solution obtained by mixing 10 cc of N/10 HCl and 10 cc of N/10 NaOH ?
The pH value of 0.1 M hydrochloric acid is approximately 1. The approximate pH value of 0.05 M sulphuric acid is most likely to be
2 1 [OH [O / 2 10 OH x x x x
A solution of an acid has pH = 4.70. Find out the concentration of OH– ions (pKw = 14)
A solution contains 10ml of 0.1 N NaOH and 10 ml of 0.05 Na2SO4. pH of this solution is
The pH of a solution is increased from 3 to 6; its H + ion concentration will be :
The dissociation constants of monobasic acids A, B, C and D are 6 × 10 –4, 5 × 10 –5, 3.6 × 10 –6 and 7 × 10 –10 respectively. The pH values of their 0.1 molar aqueous solutions are in the order :
Equal volumes of two solutions of hydrochloric acid are mixed. One solution has a pH 1 while the other has a pH 5. The pH of the resulting solution is :