Question

Write a balanced chemical equation for the reaction of calcium oxide with water.

Answer 1

Hint: Some oxides react with water to give their hydroxides. Same, way some oxides are also known as anhydrides. If a water molecule is removed from such a hydroxide, we get its oxide.

Complete step by step solution:
As we know, when water reacts with some oxides, hydroxides are formed. Same is the case for calcium oxide. When water reacts with it we get calcium hydroxide.
The balanced chemical reaction is as follows
\[CaO+{{H}_{2}}O\to Ca{{(OH)}_{2}}\]

Additional information:
-CaO is also commonly known as quicklime or burnt lime. It is caustic alkaline and is crystalline solid at room temperature. CaO is used for ph correction of water and also as a disinfectant. It can act as disinfectant due to the excess lime.
-CaO is used for the production of calcium carbonate by reacting it with carbon dioxide. Calcium carbonates are used as mortar for sealing the gaps in bricks and stones etc.
-CaO is prepared from thermal decomposition of materials, such as limestones that have calcium carbonate in a lime kiln. Heat the material by the process of calcination, which liberates carbon dioxide molecules.
-Calcium hydroxide is called the slaked lime. It is also white crystalline powder. It has many applications in food preparation. It is used as a flocculant in sewage treatment. It is also used in the paper industry; it is an intermediate in the reaction in the production of sodium hydroxide.

Note: Only ionic metal oxides can react with water to give hydroxides giving a basic solution. Most Non-metal oxides react with water to form acids resulting in an acidic solution.