Chemical+reactions

=Revision: Chemical reactions=

When elements react together they form compounds,compounds are very difficult to separate. Sometimes elements are mixed together and there is no chemical reaction: this is called a **mixture.** They are easy to separate.

chemicalreactionforchildren.wordpress.com

Air is a mixture of compounds & elements. Oxygen is an element in air. Carbon dioxide is a compound.

When something reacts with **oxygen** it forms an **OXIDE.** Iron + oxygen= Iron Oxide copper + oxygen = copper oxide magnesium + oxygen= magnesium oxide

Iron Oxide

When something reacts with **sulphur** it makes **SULPHATES.** Iron + sulphur = Iron sulphides Zinc + sulphur = Zinc sulphides Zinc Sulphides

When something reacts with **chlorine** it makes **CHLORIDES.** Iron + chlorine = Iron chlorides Copper + chlorine = Copper chlorides Zinc + chlorine = zinc chlorides Copper chlorides chinabaohai.en.made-in-china.com ironoxidepigments.net flourish2010.en.made-in-china.com

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Here is a video showing many different examples of chemical reactions: media type="youtube" key="UkBhW8Kj3r8" height="315" width="560" []

These videos below focus more on one experiment at a time:

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