Acids and Bases, from class notes

I know I've already done a post about acids and bases. But we're doing it again in class, so yeah... I'm just kinda taking notes.
Acids:
1. Tastes sour
2. Turns blue litmus paper red
3. pH < 7
4. Contains/Produces hydrogen ions, Hydrogen ions must be present (H+)

Examples:
- Hydrochloric acid (Strong acids)
- Sulfuric acid (Strong acids)
- Nitric acids (Strong acids)
- Ethanoic acid (Weak acids)
- Carbonic acid (Weak acids)

They can be grouped according to their 'strength'. Like strong and weak acids.
The above chemical formulas for all these examples are in my notebook.. cause they can't be typed out.

You only see ions when the acid is in water, it needs to be in water.
Dissociation means that something has been broken up. Something can mean the above chemical formulas.

Hydrogen must always be a '+'.
graphite is a covalent compound that can conduct electricity (delocalized electrons)