Question

A. Reaction of water with slaked lime.
1. Take about 10 gm lime in a clean and dry china dish, place this dish on an asbestos sheet.
2. Take a little water in a beaker, using dropper sprinkle some water on the lime in the dish.
Record your observations.
Observation :
Sr.No. Experimental procedure
Obsertvations
1
2.
Note the heat absobed or evolved during
the reaction by touching the dish.
Note whether a gas or vapour is given
away in the reaction.
Note the noise, if, any, produced during
the reaction.
3
4.
Note the change in the physical state​

Answer 1

Explanation:

The formation of Salked lime (calcium hydroxide ,ca(0H) 2 ) When water is added to lime (Ca 0) is exothermic.

Ca0 (s) + H2O (I) ------> Ca(OH) 2 (s) .

This reaction occurs when water is added to dry Portland Cement to make concrete and heat evolution of energy as heat is evident because the mixture becomes warm.

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