1. They are solutions of compounds in water. Acids are liquids
2. If concentrated they can be corrosive.
3. Turn blue litmus paper red - this is an easy test for an acid!
4. Usually react with metals to form salts. Acids are sour!
5. Acids release hydrogen ions, H+ in solution.
6. Turn Universal Indicator from green to red, and have a pH less than 7.
Examples of acids: are vinegar (ethanoic acid) and lemon juice (citric acid)
magnesium + hydrochloric acid -> magnesium chloride + hydrogen gas
1. Hydrochloric acid, HCl(aq)
2. Nitric acid, HNO3(aq)
3. Sulphuric acid, H2SO4(aq)
4. Phosphoric Acid, H3PO4
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