Strong Acids and Weak Acids

• Strong acid


  Acid molecule fully ionizes in aqueous solution, releasing hydrogen ions (H+)
• Weak acid


  Acid molecule only partially ionizes in aqueous solution, releasing some hydrogen ions (H+)
• Strong acids


  Have a lower pH than weak acids for a given concentration
• As the pH scale decreases by 1 unit, the concentration of hydrogen ions increases by 10 times (1 order of magnitude)
• As the pH scale decreases by 3 units, the concentration of hydrogen ions increases by 100 times (2 orders of magnitude)
• Dilute acid


  Has fewer acid molecules in a given volume than a concentrated acid, even if the strength is the same
• Concentrated acid


  Has more acid molecules in a given volume than a dilute acid, even if the strength is the same