i. Take small quantity of quick lime (CaO) in a beaker.
ii. Slowly add water to thequick lime (CaO) taken in the beaker.
iii. Touch the beaker with fingers and make a note of the change in temperature.
Observations:
i. Quick lime reacts vigorously with water producing hissing sound.
ii. Beaker becomes hot.
Inferences:
Quick lime (calcium oxide) reacts with water vigorously to form calcium hydroxide and releases large amount of heat.
It is an example of a combination reaction as well as an exothermic reaction.
