acids bases and ph
DESCRIPTION
Acids Bases and pH. Year 8 Science Mr Kos. Acids and Bases at Home: Animal Stings Some animal stings contain acids ( eg ant or bee). These can be neutralised by a base like most soaps. Other stings can be basic ( eg wasp or jellyfish) and they can be treated using an acid like vinegar. - PowerPoint PPT PresentationTRANSCRIPT
ACIDS BASES AND PH
Acids Bases and pHYear 8 ScienceMr KosThis template can be used as a starter file for presenting training materials in a group setting.
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1Acids and Bases at Home:
Animal StingsSome animal stings contain acids (eg ant or bee). These can be neutralised by a base like most soaps. Other stings can be basic (eg wasp or jellyfish) and they can be treated using an acid like vinegar.
Acids and Bases at Home:
GardeningSome plants prefer acid soil and some basic soilLime increases pH (basic)Ammonium Sulphate decrease pH (acidic)
SwimmingSwimming pool needs to be between pH 7.2-7.8
Reactions of Acids and Bases:With Carbonates
Carbonate + Acid Salt + Water + Carbon Dioxide
EgSodium Bicarbonate + Hydrochloric acid Sodium Chloride + Water + Carbon Dioxide
Reactions of Acids and Bases:With Hydroxides
Hydroxide + Acid Salt + water
Eg
Sodium Hydroxide + Hydrochloric acid Sodium chloride + Water
Reactions of Acids and Bases:With Metals
Metal + Acid A Salt + Hydrogen
Eg
Zinc + Hydrochloric Acid Zinc Chloride + Hydrogen
Testing Gold with acids:
Scratch the object with a file and apply a drop of Nitric Acid. If the object turns a bright green it is gold plated or gold filled on base metal. If the object turns a pinkish cream colour it is plated or gold filled on silver. 10 karat gold will turn dark brown. 12 karat gold will turn light brown. 14 karat or higher will have little or no reaction.