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  • Why does the pH of the water become lower after using the reverse osmosis membrane?

    The pH indicates the degree of acidity and alkalinity of the aqueous solution. In the case of thermodynamic standard conditions, the aqueous solution of pH=7 is neutral, the pH is <7, and the pH is >7.

    Many people may find that the pH of the water drops slightly after the tap water is purified by the water purifier of the reverse osmosis membrane filter. Why is this?
    This is because after the purification of the reverse osmosis membrane, the amount of calcium and magnesium ions in the water is reduced, and the solubility of CO2 is increased, eventually causing a slight decrease in the original pH of the water.

    Some people will say that such slightly acidic water is not conducive to drinking, in fact, it is a wrong view, because even if the pH of the water after reverse osmosis purification has decreased, it will be normal in China's water quality standards. Within the scope.

    According to China's "Standard for Drinking Water", the pH of tap water should be controlled within the range of 6.5-8.5. Therefore, as long as it is within this range is in line with the standard. Its slightly acidic pH is still within the standard range and does not affect our drinking water health.

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