Chemistry - Reactivity series (i dont get it)

[ana_mujahid]

ok on my chemistry specification it says:

-describe the sacrificial protection of iron and mild steel in terms of the reactivity series


On my books it describes nothing on what ive mentioned, except that railway workers use the reaction between aluminium and iron oxide to weld rails together.


any ideas :(

[Unique Muslimah]

Its just one of the methods to prevent rusting/corrosion whereby,you connect the iron or steel object to something more reactive,like magnesium or zinc.So thenn,obviously the more reactive metal(magnesium or zinc) will corrode more readily than the iron/steel..so it's protected from corrosion.

[Unique Muslimah]

Oh yeah,and it's called sacrifical protection because the magnesium or zinc is "sacrificed" to protect the iron

[ana_mujahid]

oh i c i c,

what is the pattern in the reactions of elements and their compounds, to a reactivity series?

[Ibn Al-Jarrah]

Reactivity Series (http://en.wikipedia.org/wiki/Reactivity_series)

The ones higher in the series displace the lower ones from their compound.

[ana_mujahid]

Reactivity Series (http://en.wikipedia.org/wiki/Reactivity_series)

The ones higher in the series displace the lower ones from their compound.

oh yeah, i learnt this stuff in year 10 and forgot it all :S

thanks:)

[Ibn Al-Jarrah]

http://www.bbc.co.uk/schools/gcsebitesize/img/gcsechem_38.gif

lol this is from bitesize man

[SunniHammer]

ok on my chemistry specification it says:

-describe the sacrificial protection of iron and mild steel in terms of the reactivity series


On my books it describes nothing on what ive mentioned, except that railway workers use the reaction between aluminium and iron oxide to weld rails together.


any ideas :(

its called thermite reaction