`50mL` of `0.2M` solution of an acid `Ha(K_(a)=10^(-5))` & `50mL` of a `NaA` solution are given. What should be the concentration of `NaA` solution to make a buffer solution with `pH=4` upon mixing the two?

A buffer solution is made by mixing a weak acid HA (K_(a) =10^(-6)) with its salt NaA in equal amounts. What should be amount of acid or salt that should be added to make 90 mL of buffer solution in which if 0.1 mole of strong acid are added into 1 L of this buffer solution then change in pH is unity ?

How much volume of 0.1M Hac should be added to 50mL of 0.2M NaAc solution to have a pH 4.91 ?

What volume of water should be added to 50 mL M/5 HCI solution to make it decimolar?

10mL of 2(M) NaOH solution is added to 200mL of 0.5 (M) of NaOH solution. What is the final concentration?

Solution of a monobasic acid has a pH=5. If one mL of it is diluted to 1 litre, what will be the pH of the resulting solution ?

4 ml of HCl solution of pH = 2 is mixed with 6 ml of NaOH solution of pH=12 . What would be the final pH of solution ?( log 2 = 0.3 )

4 ml of HCl solution of pH = 2 is mixed with 6 ml of NaOH solution of pH=12 . What would be the final pH of solution ?( log 2 = 0.3 )

When 100 ml of M/10 NaOH solution and 50 ml of M/5 HCI solution are mixed, the pH of resulting solution would be

What volume of 0.10 M sodium formate solution should be added to 50 mL of 0.05 M formic acid to produce a buffer solution of pH = 4.0 ? pK_a for formic acid = 3.80?

10 ml of 0.2 M acid is added to 250 ml of a buffer solution with pH = 6.34 and the pH of the solution becomes 6.32 . The buffer capacity of the solution is :