What is the pH of a solution that is 0.20 M in HF and 0.40 M in NaF ? `[K_a=7.2xx10^(-4)]`

The pH of a solution containing 0.1 M HCOOH and 0.050 M HCOONa (K_(a)= 2.0 xx 10^(-4)) is equal to

What is the pH of a solution obtained by mixing 10 mL of 0.1 M HCl and 40 mL 0.2 M H_(2)SO_(4) ?

Calculate [H^+],[HCOO^(-)] and [OCN^(-)] in a solution that contains 0.1 M HCOOH (K_a=2.4xx10^(-4)) and 0.1 M HOCN (K_a=4xx10^(-4)) .

Calculate [H^+],[HCOO^(-)] and [OCN^(-)] in a solution that contains 0.1 M HCOOH (K_a=2.4xx10^(-4)) and 0.1 M HOCN (K_a=4xx10^(-4)) .

What is the pH of a 0.20 M HA solution (K_a=1.0xx10^(-6)) that contains 0.40 M NaA ?

Predict whether or not AgCl will be precipitated from a solution which is 0.02 M in NaCl and 0.05 M in KAg(CN)_2 . Given K_("inst") (Ag(CN)_2^-) = 4.0 xx 10^(-19) M^(2) and K_(sp) (AgCl) =2.8 xx 10^(-10) M^(2) .

What is the Ph of a solution obtained by mixing 10 ml of 0.1 M HCl and 40 ml of 0.2M H_2SO_4 ?