A base (also called an alkali) is a substance that consists of a metal ion combined with a hydroxide ion. Examples are sodium hydroxide and potassium hydroxide.
Metal Hydroxide + Acid = Metal Salt + Water
metal hydroxide
Iron Sulphate + Sodium Hydroxide -> Sodium Sulphate (Na2SO4) and Iron Hydroxide (Fe(OH)2)
(NH4)3 2PO4 + 3Ba (OH)2 = 3NH4 2OH + Ba3 (PO4)2
Decomposition!
Metal Hydroxide + Acid = Metal Salt + Water
calcium hydroxide is an ionic molecule since it consists of calcium which is a metal plus hydroxide which is non metal
metal hydroxide
synthesis
Metal oxide + Water --> Metal hydroxide
I think you mean metal + water = metal hydroxide + hydrogen. This is a displacement reaction. It can also be called a redox reaction.
single replacment reaction
You get the metal hydroxide instead of the metal oxide. This happens with extremely reactive metals such as sodium. 2Na + 2H2O --> 2NaOH +H2
salt
A water plus a metal makes a metal hydroxide and hydrogen gas For example, Potassium + Water ---> Potassium Hyroxide + Water 2K + 2H20 ---> 2KOH + H2
= iron hydroxide plus sodium chloride
Sodium hydroxide plus hydrochloric acid equals sodium chloride plus water.