Question

19. If Ka of HCN = 4 x 10^-10, then the pH of
2.5 x 10^-1 molar HCN (aq) is:-
(1) 4.2(2) 4.7 (3) 0.47 (4) 5.0​

Answer 1

Answer:

some of these are good and I think I will work on getting a better one for you mark and I will work on it is called a bit late to work properly on different things the

other people that explain the