Sep

26

In what form is CO2 found in natural mineral water springs?

Filed Under mineral water 

boring g asked:


In what form is CO2 found in natural mineral water springs, how does it get there and why is it removed and then added back before bottling?

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  • Why Does Bottled Natural Mineral Water Have A Sell By Date On It?
  • arranged to form a continuous vessel for water and mineral transport?

    • Comments

    3 Responses to “In what form is CO2 found in natural mineral water springs?”

    1. jeepfaust on September 27th, 2009 5:49 am

      Form - Gas (is a form of liquid)

      Reason - organic decomposition

      I do not know botteling all that well but i would suppose they remove it then add in “FDA” approved CO2….

    2. Scientist13905 on September 27th, 2009 10:39 am

      CO2 is found in mineral water as the anion HCO3- and also as the anion CO3= and as H2CO3, with the former one the most abundant.
      CO2 is incorporated in the water mostly when it rains by the reaction:

      H2O +CO2 = H2CO3 (1) Which is a weak acid.

      That’s why the pH of rain is approximately 5.5 and not neutral.

      This weak acid react with the rock extracting ions which tend to neutralize the water giving it the special taste.

      The reason they take it away the CO2 and put it back on in some cases is based on consumer taste. You are used to sodas (like Coke or Pepsi, etc) and you expect carbonated mineral water to have the same strength than a soda. If you like just mineral water that taste like regular water then you don’t like to have a slight soda taste or intermediate taste.

      The taste of mineral water is also controlled by other ions, like Iron, sulfur, etc.

      I tried once a real natural mineral water at its source and it tasted unpleasant (but drinkable), it was saturated in Iron and partly carbonated but not as strongly as a regular soda.

    3. sbravosystems on September 28th, 2009 6:13 pm

      California Hot Springs, located within the Sequoia National Forest in California has a natural hot mineral spring. They tap it to run the facilities water lines, pool and 2 jacuzzis. They use no chlorine or additives, and the water is hot for the jacuzzis and cooled down a little bit for the big pool. It tastes pure and slightly sweet.

      In Yosemite, there is a natural soda water spring. I saw it but didnt taste it. I was told it was very pure and mildly carbonated. Scientists cannot figure out why that spring does what it does. So says the info sign.