Water purifier out how acidAfter the PH test, the water without the purifier is about 6.8 of the pH value, but the pH of the water coming out of the purifier is about 5.6. What's the problem? Is there a problem with the purifier?
If the water contains CO2, effluent pH value will decrease, for the majority of water purifier water pH value will be 1 ~ 2 pH value decreased, when the influent alkalinity and HCO3 is high, the pH value of the effluent decreased more. A small amount of water, containing less CO2, HCO3 - or CO32 - produced less water and less pH.
Water containing CO2, CO2 and HCO3 in water and CO32 formed between the dissociation equilibrium of certain, because some of the water purifier (RO film) can be dissolved ion removal without removing dissolved gas, so the content of CO2 in the effluent water purifier and water content based CO2 the same. But HCO3 and CO32 can often be reduced by 1 to 2 orders of magnitude, it will break the balance between the water dissociation of CO2, HCO3 and CO32, in a series of reactions, CO2 and H2O will be the transfer of the following reaction equilibrium, until the establishment of a new balance.CO2+H2O=HCO3+H+
Magnesium and other cations, so tap water is also called "hard water". The removal of these cations by the general water purifier, so the result will show weak acidity
Generally speaking, tap water is weak alkaline because the water usually contains a certain amount of calcium in water,
