Water pH test

Use a pH test to find out whether different kinds of water are acidic, basic or neutral.
Science content
Chemistry: States of Matter, Properties of Materials (K-7)
Lessons activity is in
  • water from different sources: seawater, drinking water
  • pH test kit that can distinguish between pH 6, 7 and 8

Test seawater for pH (it is generally pH 8 or basic).
Compare to drinking water (neutral or slightly acidic).
Compare to stream water (usually neutral).
Students might also want to test the pH of their spit (neutral).

Grades taught
Gr 4
Gr 5