Chemical Equili...

The buffering action of an acidic buffer is maximum when its pH is equal to

Which of the following is not a buffer solution ?

The pK_a of a weak acid, H A, is 4.80. The pK_b of a weak base, BOH is 4.78. The pH of an aqueous solution of the corresponding salt, BA, will be

A buffer solution is prepared by mixing equal concentration of acid (ionisation constant K_a) and a salt. The pH of buffer is

A buffer solution is prepared by mixing 0.1, M ammonia and 1.0 M ammonium chloride. At 298 K, the pK_b of NH₄OH is 5.0. The pH of the buffer is

Assertion (A) The aqueous solution of CH₃COONa is alkaline in nature.
Reason (R) Acetate ion undergoes anionic hydrolysis.

The pK_a of a weak acid H A is 4.5. The pOH of an aqueous buffered solution of HA in which 50% of the acid ionised is

The rapid change of pH near the stoichiometric point of an acid base titration is the basis of indicator detection. pH of the solution is related to the ratio of the concentrations of the conjugate acid (HIn) and base (In^- ) forms of the indicator given by the expression

The hydrolysis of sodium carbonate involves the reaction between

Which one of the following salts on being dissolved in water gives pH > 7 at 25°C ?