What is the difference between a strong acid and a concentrated acid?

1. Strong and weak describe how completely an acid ionises when it is put into water. 2. A strong acid ionises almost completely, a weak acid only ionises to a small extent. 3. Concentrated and dilute describe how much acid was added to the solvent. 4. So a strong acid can be prepared as a dilute solution, and a weak acid can be concentrated. 5. Confusing the two is the usual mistake, which is why the amount added is the wrong answer here. _Source: Siyavula Physical Sciences Grade 12 (Everything Science, CC BY 4.0), Chapter 9: Acids and bases_