OCR GCSE Chemistry A · J248
Specification C3.3j, CM5.2iv · Paper 1 (Foundation), Paper 2 (Foundation), Paper 3 (Higher), Paper 4 (Higher)
Revise: Logarithmic pH ScaleThe pH scale is logarithmic, not linear. This means that a change of one pH unit does not represent the same small amount being added or removed. Instead, each one-unit change represents a factor of 10 change in hydrogen ion concentration.
- Revise: Proportionality in Rates
A multiplicative comparison found by dividing one value by another; for example, a factor of 2 means twice as large.