He was convicted at Grimsby Crown Court under The Poisons Act 1972. Prosecuting, Michael Masson told how police discovered ...

Two dry solids --- barium hydroxide and ammonium nitrate --- are mixed to produce an endothermic reaction. The temperature of the mixture drops approximately 45oC and is cold enough to freeze the ...

These would react with barium ions in the test ... Carbonate ions also produce a white precipitate with silver nitrate solution. The acid reacts with any carbonate ions present.