This workshop looks at the effect carbon dioxide concentration is having on the equilibrium between carbonate ions and hydrogen carbonate ions in the worlds oceans.
It contains work on weak acids, indicators and equilibria.
As well as this Advanced Higher project, there is also s impler work suitable for CfE.
Ocean Acidification CfE Experiment Guide
Ocean Acidification CfE Teacher’s Guide
Photo by seriocomico – Creative Commons Attribution- ShareAlike 2.0 Generic license.