H is 4*10^6 M , OH is 2.5*10^-9 M
I would agree with the second one, not the first. You can't always see the chemical reaction, and it isn't always sudden. But the second claim is true.
Filtration is useful for separating sediments that are carried in water for easy drinking without the risk of disease - an example of this is a water purifier
Answer:
-data collected from Mauna Loa shows an increase in CO2 by 20% in the last 40 years
-ice core data shows links between CO2 and temperature, with a recent increase in both
-data from ice cores and other proxies show increases in CO2, CH4, and N2O since the Industrial Revolution
