Loading…
Loading…
GCSE Combined Science · key term
A numerical measure of how acidic or alkaline a solution is; neutral solutions have a pH of 7.
Used by AQA and Edexcel
Specification 5.4.2.4, 5.10.1.2 · Paper 3, Paper 4
A numerical measure of how acidic or alkaline a solution is.
Revise: The pH Scale and NeutralisationThe pH scale measures how acidic or alkaline a solution is.
A measure of how acidic or alkaline a solution is. A neutral solution has pH 7.
Specification Acids · Paper 3, Paper 4
Revise: Acids, alkalis, pH and acid strengthThe pH scale tells us how acidic or alkaline a solution is.
Universal indicator gives an approximate pH: compare its colour with the chart supplied for that indicator.
Use ‘more acidic’ for a lower pH and ‘more alkaline’ for a higher pH. A pH value alone does not tell you whether an acid is strong or weak.
A suitable pH and a small residue do not prove that a water sample is safe to drink: harmful microbes may still be present.
Create a free account to read GCSE Combined Science revision notes for your exam board and track your progress.