Encyclopedia > Activity series of metals

  Article Content

Activity series of metals

Metals Metal Ion Reactivity
K K+ reacts with water
Ca Ca2+
Na Na+
Mg Mg2+ reacts with acids
Al Al3+
Zn Zn2+
Fe Fe2+
Ni Ni2+
Sn Sn2+
Pb Pb2+
H2 H+
Cu Cu2+ highly unreactive
Hg Hg2+
Ag Ag+
Au Au3+

Metals are listed in decreasing ease of oxidation, or increasing ease of reduction. A metal can replace metals listed below it in the activity series, but not above. For example, sodium is highly active and thus able to replace hydrogen from water:

2 Na (s) + 2 H2O (l) -> 2 NaOH (aq) + H2 (g)
Metals that can replace hydrogen within acids but not water are listed in the middle of the activity series, for example zinc replaces hydrogen in sulfuric acid:
Zn (s) + H2SO4 (aq) -> ZnSO4[?] (aq) + H2 (g)

The activity series has applications in electrochemistry, where two dissimilar metals are chosen as electrodes of a battery.

All Wikipedia text is available under the terms of the GNU Free Documentation License

  Search Encyclopedia

Search over one million articles, find something about almost anything!
  Featured Article
Reformed churches

... Commitment to teaching the original Calvinism, although it usually continues to be reflected in their official definitions of doctrine, is no longer necessaril ...

This page was created in 85 ms