The equation shows that ammonium chloride (a white solid ... The white solid turns blue in the presence of water. A similar reversible reaction takes place between anhydrous cobalt(II) chloride ...

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 ...

The building blocks of life on Earth may have been fueled by tiny sparks hopping between water droplets. Four billion years ...

ammonium nitrate and ammonium sulfate – can be identified by heating a solution of the ions with sodium hydroxide. This reaction produces ammonia gas, as shown in the ionic equation below: ...

The reaction, referred to by scientists as ... The researchers are hopeful that once their system extracts ammonium from the water, the rest can be used to irrigate crops.

Commercial heat packs (containing iron and water, or supersaturated sodium acetate) and cold packs (various ammonium salts) can be used to show exo- and endothermicity. Heat packs that contain iron ...