An environmental chemist tests a wastewater sample for the presence of sulfate ions by adding aqueous barium chloride to the solution. A dense, white solid of barium sulfate immediately forms and settles at the bottom of the reaction vessel.
What is the classification of this type of chemical reaction?
Displacement
Precipitation
Thermal decomposition
Neutralisation
55 exam-style questions on OCR GCSE Chemistry Types of chemical reactions. Each one has a worked solution and a mark scheme showing where the marks go.