Large number of people have the habit to drink water in the
morning, right after they wake up. Probably your parents have told you that it
is very healthy.
If you have this strange habit, probably you have noticed
that the water have strange taste.
The food contains sugars and proteins which cans be easily
targeted by microbes and to come to pollution. Although regular water does not
contain any of these nutrients and there is no explanation from which comes the
strange taste in the water that stood on the nightstand over the night by your
bed.
Still, there is large amount of dust and bacteria that can
be gathered in that glass of water. When water is exposed to air it absorbs
carbon dioxide and a small part of that CO2 is converted into carbonic acid,
which means that water exposed to the air changes its chemical composition. So,
when carbon acid releases one or two protons and is turned into carbonate or
bicarbonate, it lowers the pH of water and changes its taste.
The water actually is not bad, but certainly has changed the
taste after standing all night in the nightstand and gathering bacteria and
dust from the air.
After reading this, surely you will think twice if you
should or should not drink it.