Chemistry module 5

• whats the equation for [H+] in weak acids?

  $[H+] =$$√Ka HA$
• how do you work out [H+] in strong acids?

  -log(H+)
• whats the equation for Ka in weak acids ?

  $Ka =$$[H+]^2 / [HA]$
• whats the equation for ionic product of water?

  Kw = [H+][OH-]
• how do you work out the [H+] in a buffer?


  [H+] = Ka x [acid] / [salt]
• how do you work out the [acid] : [salt]?

  [H+] / Ka