Students recognize that a particular color change is a characteristic property of a substance and that a color change can also be used as evidence that a chemical reaction has occurred ... laundry ...

If they collide with enough energy, bonds can break and new bonds can form in a chemical reaction. The reactants just sit there until energy is added with the flame. The added energy is enough to make ...

Chemical reactions conducted at temperatures or pressures above or below ambient conditions must be performed in a manner that minimizes hazards such as explosion or vigorous reaction. Provide a ...

Some chemical reactions result in a product that is in a different state to the reactants. An example of this is effervescence in which a reaction in a liquid produces bubbles of gas ...

A new study from Cardiff and Bristol universities makes it possible to visualise chemical reactions involving small molecules, using software. Computer simulations are an increasingly crucial part of ...