acids

acids

1. PHYSICAL properties

   • sour taste
   • dissolve in h20 to form or produce solutions that conducts electricity
   • turn MOIST blue litmus red
   • turns universal indicator
     • orange (weak acid)
     • red(strong acid)

2. chemical properties

   • acid+ reactive metal= metal salt + hydrogen gas
     • (unreactive metal) : silver/gold /copper
     • hcl + zinc= zinc chloride + hydrogen gas
     • (test for hydrogen gas:) place lighted spilt at the mouth of the test tube. the lighted spilnt will extinguished with a pop sound
   • acid+ carbonate= salt + carbon dioxide + water
     • hno3 + zinc carbonate= zinc nitrate +h20 +co2
     • test for carbon dioxide : bulblble gas with limewater , a white percipitate will be formed
   • acid+base= salt + water
     • base is any metal oxide or hydroxide
     • h2so4 + calcium hydroxide = calcium sulfate + h20
   • acid +alkali = salt + water
     • neutralisation
     • sodium hydroxide+ hno3 = sodium nitrate + h20

3. hydrocloric acid (hcl), nitric acid(hno3), sulfuric acid(h2so4)

4. WHAT? : produce h+ ions in aq solutions when dissolve in water