pH

[sav07]

Hey! The question says:
HA has Ka 1.6 x 10^-5
Calculate the pH of a 0.001 ml L solution of HA
I was just wondering how I can calsulate the pH from the Ka

[kauac]

Hey! The question says:
HA has Ka 1.6 x 10^-5
Calculate the pH of a 0.001 ml L solution of HA
I was just wondering how I can calsulate the pH from the Ka

Hi, would you be able to clarify your acronyms?

HA = hydrochloric acid?
Ka = ??

[sav07]

HA is just an acid it doesn't specify which one, and Ka is the equilibrium constant for the acid dissociation

[david.wang28]

HA is just an acid it doesn't specify which one, and Ka is the equilibrium constant for the acid dissociation

Hi Sav! If this is HA, then you would want to write H^+ + A^- as your dissociation reaction. Then you would want to write the Ka reaction (products over reactants). You should find the concentration of HA (c= n/v) and once you have done that, draw up an ICE table (I'm sure you can work this out for yourself). Then, find the concentration of H^+, and sub that number into pH = -log(H^+), and you should get the answer!