1. If a metal reacts with an acid bubbles are seen as a colourless chloridecolourcopperdissolvesfasterfirstgashydrochlorichydrogenironmagnesiumnitratenitricpopreactiverisesaltsecondslowingsolublesulphatesulphuriczinc forms.

2a. Usually the metal chloridecolourcopperdissolvesfasterfirstgashydrochlorichydrogenironmagnesiumnitratenitricpopreactiverisesaltsecondslowingsolublesulphatesulphuriczinc to form a chloridecolourcopperdissolvesfasterfirstgashydrochlorichydrogenironmagnesiumnitratenitricpopreactiverisesaltsecondslowingsolublesulphatesulphuriczinc solution.
2b. Other signs of a chemical change may include a chloridecolourcopperdissolvesfasterfirstgashydrochlorichydrogenironmagnesiumnitratenitricpopreactiverisesaltsecondslowingsolublesulphatesulphuriczinc change and a temperature chloridecolourcopperdissolvesfasterfirstgashydrochlorichydrogenironmagnesiumnitratenitricpopreactiverisesaltsecondslowingsolublesulphatesulphuriczinc.

3. The gas gives a squeaky chloridecolourcopperdissolvesfasterfirstgashydrochlorichydrogenironmagnesiumnitratenitricpopreactiverisesaltsecondslowingsolublesulphatesulphuriczinc with a lit splint, and so is chloridecolourcopperdissolvesfasterfirstgashydrochlorichydrogenironmagnesiumnitratenitricpopreactiverisesaltsecondslowingsolublesulphatesulphuriczinc.

4. The chloridecolourcopperdissolvesfasterfirstgashydrochlorichydrogenironmagnesiumnitratenitricpopreactiverisesaltsecondslowingsolublesulphatesulphuriczinc part of the name of the salt formed is the metal added to the acid.

5. The chloridecolourcopperdissolvesfasterfirstgashydrochlorichydrogenironmagnesiumnitratenitricpopreactiverisesaltsecondslowingsolublesulphatesulphuriczinc part of the name depends on the acid used. Hydrochloric acid makes a chloridecolourcopperdissolvesfasterfirstgashydrochlorichydrogenironmagnesiumnitratenitricpopreactiverisesaltsecondslowingsolublesulphatesulphuriczinc salt, chloridecolourcopperdissolvesfasterfirstgashydrochlorichydrogenironmagnesiumnitratenitricpopreactiverisesaltsecondslowingsolublesulphatesulphuriczinc acid makes a nitrate salt, and sulphuric acid makes a chloridecolourcopperdissolvesfasterfirstgashydrochlorichydrogenironmagnesiumnitratenitricpopreactiverisesaltsecondslowingsolublesulphatesulphuriczinc salt.

6. The metals are NOT equally chloridecolourcopperdissolvesfasterfirstgashydrochlorichydrogenironmagnesiumnitratenitricpopreactiverisesaltsecondslowingsolublesulphatesulphuriczinc and form an 'activity series'. For example, chloridecolourcopperdissolvesfasterfirstgashydrochlorichydrogenironmagnesiumnitratenitricpopreactiverisesaltsecondslowingsolublesulphatesulphuriczinc reacts chloridecolourcopperdissolvesfasterfirstgashydrochlorichydrogenironmagnesiumnitratenitricpopreactiverisesaltsecondslowingsolublesulphatesulphuriczinc than iron, and one of the least reactive is chloridecolourcopperdissolvesfasterfirstgashydrochlorichydrogenironmagnesiumnitratenitricpopreactiverisesaltsecondslowingsolublesulphatesulphuriczinc.

7. Calcium, quite a reactive metal, is slow reacting in chloridecolourcopperdissolvesfasterfirstgashydrochlorichydrogenironmagnesiumnitratenitricpopreactiverisesaltsecondslowingsolublesulphatesulphuriczinc acid because calcium sulphate isn't very chloridecolourcopperdissolvesfasterfirstgashydrochlorichydrogenironmagnesiumnitratenitricpopreactiverisesaltsecondslowingsolublesulphatesulphuriczinc. When it forms it coats the calcium metal chloridecolourcopperdissolvesfasterfirstgashydrochlorichydrogenironmagnesiumnitratenitricpopreactiverisesaltsecondslowingsolublesulphatesulphuriczinc the reaction down.

8. Complete the word equations:
(a) chloridecolourcopperdissolvesfasterfirstgashydrochlorichydrogenironmagnesiumnitratenitricpopreactiverisesaltsecondslowingsolublesulphatesulphuriczinc + nitric acid ==> magnesium chloridecolourcopperdissolvesfasterfirstgashydrochlorichydrogenironmagnesiumnitratenitricpopreactiverisesaltsecondslowingsolublesulphatesulphuriczinc + hydrogen
(b) chloridecolourcopperdissolvesfasterfirstgashydrochlorichydrogenironmagnesiumnitratenitricpopreactiverisesaltsecondslowingsolublesulphatesulphuriczinc + sulphuric acid ==> iron sulphate + chloridecolourcopperdissolvesfasterfirstgashydrochlorichydrogenironmagnesiumnitratenitricpopreactiverisesaltsecondslowingsolublesulphatesulphuriczinc
(c) zinc + chloridecolourcopperdissolvesfasterfirstgashydrochlorichydrogenironmagnesiumnitratenitricpopreactiverisesaltsecondslowingsolublesulphatesulphuriczinc acid ==> chloridecolourcopperdissolvesfasterfirstgashydrochlorichydrogenironmagnesiumnitratenitricpopreactiverisesaltsecondslowingsolublesulphatesulphuriczinc chloride + hydrogen