bubbling1.gifMwaterStatic.gifmulti-word fill quiz 9Fwf5 on "Patterns of reactivity"
(a doc brown worksheet for QCA KS3 science-chemistry)

Site Meter* Do online OR printout, do, return to check answers. * KS3 Science Index * EMAIL comment?query * Doc Brown's Chemistry updated June 11th 2009 *

   aluminium      blue      colourless      copper      displace      displacement      fast      heat      higher      iron      less      lower      magnesium      more      oxide      rises      sulphate      thermit      weld   
thermit.gif1a. A reactive metal can displace ('push out') a reactive metal from one of its compounds (salt or oxide).
1b. However, a reactive metal cannot displace a reactive metal from one of its compounds.

2. The a metal in the reactivity series, the more placed metals it can from their compounds.

3a. When magnesium powder is added to a solution of copper sulphate the temperature and the magnesium dissolves.
3b. The solution gradually becomes and orange bits of form.
3c. The reactive magnesium has displaced the reactive copper.
3d. complete: magnesium + copper sulphate ==> +

4a. When aluminium powder is heated with iron oxide powder a 'firework' reaction happens, called the '' reaction.
4b. The reaction is: aluminium + iron oxide ==> + ,and is shown in the picture above.
4c. So much is released that the iron melts, and this reaction is used to railway lines together.