In chemistry, a strong acid is an acid which ionizes (splits) completely in a solution of water. It always loses a proton (A H+) when put in water. A weak acid does not always lose a proton, though; It can lose its proton, but not all the time. They also have a very low pH, usually between 1 and 3. Many strong acids have a negative pKa value, which means they are very strong.
The six common strong acids are: (Acronym:CBSPIN)
- HydroChloric acid HCl
- HydroBromic acid HBr
- Sulfuric acid H₂SO₄
- Perchloric acid HClO4
- HydroIodic acid HI
- Nitric acid HNO3
Almost strong acids include:
- Chloric acid HClO3
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