Base anhydrides

As Basenanhydride is referred to oxygen-deficient oxides, usually metal oxides , which upon reaction with water basic (alkaline) reacting solutions form. The base anhydrides include, for. B. the oxides of the alkali and alkaline earth metals:

${\displaystyle \mathrm {\ Na_{2}O+\ H_{2}O\ \longrightarrow 2\ NaOH} }$

${\displaystyle \mathrm {\ CaO+\ H_{2}O\ \longrightarrow Ca(OH)_{2}} }$

In the periodic table, the basic character of the element oxides increases as well as the metallic character of the element within a group. In group 15, the oxides N ₂ O ₃ and P ₄ O ₆ react as acid anhydrides , Sb ₂ O ₃ amphoteric and Bi ₂ O ₃ as base anhydride.

Reactions

Base anhydrides form the corresponding salts with acids :

${\displaystyle \mathrm {\ CaO+\ H_{2}SO_{4}\ \longrightarrow CaSO_{4}\ +\ H_{2}O} }$

Base anhydrides also react with acid anhydrides to form salts, but without dehydration:

${\displaystyle \mathrm {\ CaO+CO_{2}\longrightarrow \ CaCO_{3}} }$

Individual evidence

1. ^ Lautenschläger, Schröter, Wanninger: Taschenbuch der Chemie . Verlag Harri Deutsch GmbH, 2005, ISBN 978-3-8171-1760-4 ( page 207 in the Google book search).
2. ↑ Erwin Riedel, Christoph Janiak: Inorganic Chemistry . de Gruyter, 2011, ISBN 978-3-11-022566-2 ( page 463 in the Google book search).
3. ^ Lautenschläger, Schröter, Wanninger: Taschenbuch der Chemie . Verlag Harri Deutsch GmbH, 2005, ISBN 978-3-8171-1760-4 ( page 208 in the Google book search).
4. ^ Wilhelm Klemm, Rudolf Hoppe: Inorganische Chemie . Walter de Gruyter & Co, 1979, ISBN 3-11-007950-X ( page 76 in the Google book search).