How much of `0.3 M NH_(4)OH` should be mixed with `30mL` of `0.2M` solution of `NH_(4)CI` to given butter solution of `pH 8.65?`

How much ml of 0.3 M NH_(4)OH should be mixed with 30mL of 0.2M solution of NH_(4)Cl to given buffer solution of pH 8.65? (pKb =4.74)

How much of 0.3M ammonium hydroxide should be mixed with 30 mL of 0.2M solution of ammonium chloride to give buffer solutions of pH 8.65 and 10 ? (Give: pK_(b) of NH_(4)OH=4.75 )

10 ml of M/10 NH_(4)OH is mixed with 4ml of M/10H_(2)SO_(4) solution. The pH of the resulting solution is (pK_(b)NH_(4)OH=4.76), (log2=0.3) .

100ml of 0.75 N NH_(4)OH is mixed with 100ml of 0.25 N HCl. The K_(b) of NH_(4) OH = 2 xx 10^(-5) . Hence pH of solution is .

How much of NH_4Cl should be added to 1L 0.1(M) NH_3 solution so that the pH of the mixed solution becomes 9.0? Assume that addition of NH_4Cl does not change the volume of the solution. lGiven: pK_b(NH_3)= 4.74 ]

What will be the amount of (NH_(4))_(2)SO_(4) (in g) which must be added to 500 mL of 0.2 M NH_(4)OH to yield a solution of pH 9.35? ["Given," pK_(a)"of "NH_(4)^(+)=9.26,pK_(b)NH_(4)OH=14-pK_(a)(NH_(4)^(+))]

What will be the amount of (NH_(4))_(2)SO_(4) (in g) which must be added to 500 mL of 0.2 M NH_(4)OH to yield a solution of pH 9.35? ["Given," pK_(a)"of "NH_(4)^(+)=9.26,pK_(b)NH_(4)OH=14-pK_(a)(NH_(4)^(+))]