How many moles of NaOCI must be added to 150 mL of 0.025 MHOCI to obtain a buffer solution with a pH`=7.50? [K_(a)(HOCI)=2.8xx10^(-8)]`

How many mole of NH_(4)CI must be added to one liltre of 1.0M NH_(4)OH to have a buffer of pH=9 ? (K_(NH_(4)OH)=1.8xx10^(-5))

How many mole of NH_4Cl must be added to one litre of 1.0 M NH_4OH to have a buffer of pH= 9. K_(NH_(4)OH)=1.8 xx 10^(-5)?

How many moles of HCOONa must be added to 1L of a 0.1 M solution of HCOOH in order to prepare a buffer solution of pH = 3.4? (Given : K_(a) of HCOOH =2 times 10^(-4) at 298 K)

If 50ml of 0.2 M KOH is added to 40 ml of 0.05 M HCOOH, the pH of the resulting solution is ( K_(a)=1.8xx10^(-4) )

If 50ml of 0.2 M KOH is added to 40 ml of 0.05 M HCOOH , the pH of the resulting solution is ( K_(a)=1.8xx10^(-4) )

How many moles of NH_(3) must be added to 1 litre of 0.1 M AgNO_(3) solution to reduce Ag^(+) concentration to 2xx10^(-7) " M "K_(d) [Ag (NH_(3))_(2)^(+)] = 6.8 xx10^(-8) .

How many moles of NH_(3) must be added to 1.0L of 0.75M AgNO_(3) in order to reduce the [Ag^(o+)] to 5.0 xx 10^(-8)M. K_(f) Ag (NH_(3))_(2)^(o+) = 1 xx 10^(8) .

How many moles of NH_(3) must be added to 1.0L of 0.75M AgNO_(3) in order to reduce the [Ag^(o+)] to 5.0 xx 10^(-8)M. K_(f) Ag (NH_(3))_(2)^(o+) = 1 xx 10^(8) .