Pure water is kept in a vessel and it remains exposed to atmospheric CO2 which is absorbed, then the PH will be:
Greater than 7
Less than 7
7
Depends on ionic product
As learnt in
Vapour Pressure -
It is defined as pressure exerted by vapours on liquid surface at equilibrium and condensation.
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CO2 will dissolve in water forming carbonic acid (H2CO3) which will drop the pH of the solution below 7.
Option 1)
Greater than 7
Incorrect
Option 2)
Less than 7
correct
Option 3)
7
Incorrect
Option 4)
Depends on ionic product
Incorrect