what can cause the ph of a closed container to drop?

Answer 1

if the container is not disinfected to inhabit bacteria then some biochemical reaction can happen inside you container and change your pH

Answer 2

The pH of a solution in a closed container can drop due to the presence of carbon dioxide. If the solution is made using distilled water that contains carbin dioxide, the carbon dioxide will react with the water molecules to produce carbonic acid:

CO2 + H2O ---> H2CO3

H2CO3 --> H+ + HCO3 -


The presence of this H+ in solution lowers the concentration inside the container and makes the solution become more acidic, which is seen as a drop in pH.

To eliminate this problem boil the distilled water just before you use it to make up your solution (remember to alow it to cool first)

Carbon dioxide can be absorb in any solution, as it sits over time.

I hope this helps =)

Answer 3

Chemical reactions inside the container?