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Planning The reaction of an acid with a metal is a good way of producing hydrogen in the laboratory. Usually a moderately reactive metal is used as this means the hydrogen doesn't come off to quickly or slowly. Zinc is quite often chosen e.g. Zinc + Sulphuric acid --> Zinc Sulphate + Hydrogen The reactivity of metals with acid can cause corrosion problems where there are acidic gasses in the air. An example of an acidic gas is Sulphur dioxide. It pollutes the air in industrial areas causing acid rain. This acidity sometimes makes cars, bridges, statues etc corrode. All metals react the same when above hydrogen in the reactivity series, an example of an equation of this is: Metal + Acid --> Metal Salt + Hydrogen All substances are made up of particles, reactions only occur if reacting particles collide together, this is called the collision theory. Collisions are only successful if the collisions exceed...

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