In the given chemical reaction, the reactants involved are quick lime which is chemically called as calcium oxide (CaO) and water. When quick lime (Calcium Oxide , CaO) reacts with water (H2O) then the exothermic reaction takes place CaO +H2O -----> Ca(OH)2 + heat evolves The name ‘quicklime’ comes from the property of the substance to react vigorously or ‘quickly’ with water. The clear solution obtained after the suspension settles is called lime water. Calcium oxide (CaO), commonly known as quicklime or burnt lime, is a widely used chemical compound.It is a white, caustic, alkaline, crystalline solid at room temperature. Evaporation of water and sublimation of camphor are examples of endothermic reactions.Here (i) Reaction of water with quicklime and (ii) Dilution of an acid are the exothermic reaction. (b) CaO (s) + H 2 O → Ca(OH) 2 + heat Quicklime slaked lime
Calcium oxide and water react to form only a single product, calcium hydroxide. All of us know that chemical reaction between calcium oxide (quicklime) with water will produce heat energy strongly by the following equation: Cao + H2O = Ca(OH)2 -> releases heat energy I have improved the reaction above to maximize the heat energy production with the following steps: I use a plastic jar whose volume is around 65.53 cm3. Take a small quantity of clear solution from the beaker in a test tube and blow exhaled air into the lime water.

Lot of heat is liberated in this reaction. (b) CaO (s) + H 2 O → Ca(OH) 2 + heat Quicklime slaked lime Calcium oxide reacts with water to form calcium hydroxide. Being highly caustic in nature, it is said to have a ‘thirst’ for water.

The quicklime is turned into slacklime or calcium hydroxide. Slaked lime means calcium Hydroxide which is produced by reaction of calcium oxide and water . CaO + H2O→ Ca(OH)2 This reaction is exothermic reaction because some amount of heat evolved in the reaction.So answer is C. Ca(OH)2+H2O ---> Ca²⁺ (aq)+ 2OH⁻ (aq) Quicklime is reacted with water to form calcium hydroxide. Cement: Calcium oxide is a key ingredient for the process of making cement. Quicklime and Water Reaction. Drops of water are added to pieces of quicklime. So the reaction is highly exothermic. So it is an exothermic reaction: Chemical Equation : Calcium oxide + water -----> Calcium Hydroxide + Heat CaO(aq) +H2O(l) ----->Ca(OH)2 (aq)+Q


This is a highly exothermic reaction. The equation is calcium oxide + water -> calcium hydroxide. The process of diluting a concentrated acid is a highly exothermic process.


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