19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
Buffer solution can be obtained by mixing aqueous solution of
A mixture of a weak acid (say acetic acid) and its salt with a strong base (say sodium acetate) is a buffer solution. Which other pair of substances from the following may have a similar property ?
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
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 ?
What is the pH of a 0.015 M Ba(OH)₂ solution ?
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
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 :
The pH of a 10 –9 M solution of HCl in water is
If the pH value is 4.5 for a solution then what is the H⁺ concentration? (a) 3.162 10 mol / L x (b) 31.62 10 mol / L x (c) 0.3162 10 mol / L x (d) 3.162 10 mol / L x
Which of the following has highest pH?