Chemical Equili...

The pK_a of a certain weak acid is 4.0. What should be the [salt] to [acid] ratio if we have to prepare a buffer with pH = 5 using the acid, and one of the salts ?

An acidic buffer solution could be prepared by mixing the solutions of the following

20 mL 0.1 N acetic acid is mixed with 10 mL 0.1 N solution of NaOH. The pH of the resulting solution is (pK_a of acetic acid is 4.74)

A 100 mL of 0.1 M solution of ammonium acetate is diluted by adding 100 mL of water. The pH of the resulting solution will be (pK_a of acetic acid is nearly equal to pK_b of NH₄OH)

A buffer solution is prepared by mixing equal concentration of a weak base with its salt of strong acid. K_b for the base is 10^-9 . pH of this buffer solution will be

A buffer solution contains 0.1 mole of sodium acetate dissolved in 1000 cm³ of 0.1M acetic acid. To the above buffer solution, 0.1 mole of sodium acetate is further added and dissolved. The pH of the resulting buffer is

The pH of an aqueous solution of CH₃ COONa of concentration C (M) is given by

Amongst the following, the total number of compounds whose aqueous solution turns red litmus paper blue is

Which buffer solution comprising of the following has its pH value greater than 7 ?

The dissociation constant of a substituted benzoic acid at 25°C is 1.0 × 10^-4. The pH of 0.01 M solution of its sodium salt is