Categories: Alternative conceptions
an. example of an alternative conception:
It is common for learners to think that strong acids (such as hydrocholic acid, nitric acid, and sulphuric acid) have pH=1.
Some standard reagents (2M or 1M acids) will have pH<1, although this may not be clear from tests with indicator papers (where the scale may only be 1 ≤ pH ≥ 14).
Learners may not take concentration into account, not realising that both acid strength and concentration are relevant. Indeed some learners may assume acid strength is measured by pH.
