A pH scale less than 7 is acidic.

A solution that has an excess of H+ ions.

The word acid comes from the Latin word acidus meaning sharp or sour.

An acid containing one less oxygen atom than the -ous acid has the prefix hypo- and the -ous ending.

【 acid 】

Tastes sour

Change litmus from blue to red.

React with bases to form salts+water.

Solution are electrolytes.

Name five common acids :

- Citric acid
- Vinegar
- Ascorbic acid
- Carbonic acid
- Lactic acid

Hydrofluoric Acid - HF
Hydrochloric Acid - HCl
Hydrobromic Acid - HBr
Hydroiodic Acid - HI
Hydrosulfuric Acid - H2S