Question

Pure water is kept in a vessel and ut remains exposed to the atmospheric co2 which is absorbed. Then the pH will be:
(1) Greater than 7
(2) Less than 7
(3) 7
(4) depends on ionic product of water​

Answer 1

Explanation:

Pure distilled water should be neutral with a pH of 7, but because it absorbs carbon dioxide from the atmosphere, it's actually slightly acidic with a pH of 5.8. Less than 7 atmospheric CO2 will dissolve in water and form H2CO3 (Carbonic acid) which well make the pH of solution drop below 7.

Answer 2

Answer:

less than 7

Explanation:

because pure water is kept in a vessel and remains absorb to air