Chemistry :

In these cards you will find main points of all Unit 2 .

  • Created by: aysha
  • Created on: 07-12-09 19:42

The PH Scale .

Neutralisation : the reaction between Acids & Bases ...

acid + base --> salt + water

H+ + OH - --> H2O (l)

When an acid neutrilises a base (or vice versa), the prouducts are neutral, i.e they have a PH of 7 .

The real life examples of neutrilisation :

-indigestion is caused by too much hydrochloric acid in the stomach. Indigestion tablets contain bases such as magnesium oxide; which neutralises the excess.

-Fields with acidic soils can be improved by adding lime . Lime is calcium hydroxide Ca(oH)2 which ofcourse is an alkali.

Lakes affected by rain can also be neutralised by adding lime. fishes are saved :)

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