ACID AND ALKALIS

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ACID AND ALKALIS

-When we dissolve a substance in water the solution could be

1. Alkalis

2. neutral

3. acidic

 

acids form h+ ions when added to water

alkalis from OH- ions when added to water

Bases are substance which neutralise acids

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Measuring acidity or alkalinity

Measuring acidity or alkalinity

- use indicators which change colour



 

- litmus paper is a well known indicator



 

- we use PH scale to see how acidic or Alkalis a solution is

 

 ph scale is from 0-14

- 0-6 PH is acidic

- 7PH is neutral

-7-14PH is Alkalis

 

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