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Question
Solid calcium oxide reacts vigorously with water to form calcium hydroxide accompanied by the liberation of heat. From the information given above it may be concluded that this reaction ______.
Options
is endothermic and pH of the solution formed is more than 7
is exothermic and pH of the solution formed is 7
is endothermic and pH of the solution formed is 7
is exothermic and pH of the solution formed is more than 7
Solution
Solid calcium oxide reacts vigorously with water to form calcium hydroxide accompanied by the liberation of heat. From the information given above it may be concluded that this reaction is exothermic and pH of the solution formed is more than 7.
Explanation:
When heat is released, it becomes exothermic and forms calcium hydroxide \[\ce{Ca(OH)2}\], a base with a pH higher than 7.
