metion any 3 ways of making base?
Answers
Explanation:
Preparation of Bases
Bases can be prepared by the following methods.
1. By the direct union of a metal with oxygen Some metals when heated in air or oxygen form the oxides of the metals.
Preparation of Bases 1
These oxides when dissolves in water make the hydroxides of metals.
Na2O + H2O → 2NaOH
K2O + H2O → 2KOH
CaO + H2O → Ca(OH)2
2. By the action of water or steam on some active metals Some active metals like sodium and potassium react with cold water to form hydroxides with the evolution of hydrogen gas.
2Na + 2H2O → 2NaOH + H2
Magnesium reacts with steam to form magnesium oxide with the evolution of hydrogen gas.
Preparation of Bases 2
On passing superheated steam over red-hot iron, ferrosoferric oxide is formed and hydrogen gas is evolved.
Preparation of Bases 3
3. By heating carbonates of some metals When calcium carbonate is heated, calcium oxide and carbon dioxide are formed.
CaCO3 → CaO + CO2
Similarly, when zinc carbonate is heated, zinc oxide and carbon dioxide are formed
ZnCO3 → ZnO + CO2
Answer:
base can be made when we higher the OH concentration level in any solution
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Explanation: