Strong and weak acids

• what is a strong acid and a weak acid?

  • S - completely ionised in aqueous solution
  • w - only partially ionised in aqueous solution
• what happens to pH as concentration of H+ increases?

  decreases
• what is a concentrated acid and what is a dilute acid? is this the same as a strong and weak acid?


  • c - has more moles of acid per unit volume than dilute
  • d - refers to solutions of low concentration
  • not the same - concentration is different to strength of an acid
  • strength refers to whether the acid is completely ionised in water (strong) or only partially (weak)
• as the pH is decreased by one unit, what change is seen in the hydrogen ion concentration?

  increases by a factor of 10