Acids, Bases + salts

• what ions do acids form when reacting

  positive H+ hydrogen ions
• what ions do alkalis form when reacting

  negative OH- hydroxide ions
• acids are proton


  Donors
• alkalis are proton


  acceptors
• acid + base --->


  salt + water
• acid + alkali --->


  salt + water
• carbonate + acid --->


  salt + water + carbon dioxide
• metal + acid --->

  salt + hydrogen
• in acidic solutions, litmus indicator solution turns...


  red
• in alkaline solutions, litmus indicator solution turns...


  blue
• in neutral solutions, litmus indicator solution turns...

  purple
• in acidic solutions, red litmus paper


  stays red
• in alkaline solutions, red litmus paper


  turns blue
• in neutral solutions, red litmus paper

  stays red
• in acidic solutions, blue litmus paper


  turns red
• in alkaline solutions, blue litmus paper


  stays blue
• in neutral solutions, blue litmus paper

  stays blue
• what does it mean if a solution is acidic

  The solution has more hydrogen ions than pure water.
• what is universal indicator

  Indicators that show a range of colours over different pH vaues
• what ions are produced when acids dissolve in water

  hydrogen (H+)
• what ions are produced when alkalis dissolve in water

  hydroxide (OH-)
• what are bases


  chemicals which can neutralise acids and produce a salt and water
• neutralisation is


  a chemical reaction in which an acid and a base interact with the formation of a salt
• acid + base --->


  salt + water
• what is titration


  A technique used to accurately measure the volume of one solution that reacts exactly with another solution