Billy 發問於 科學及數學地理學 · 1 十年前

geog問題....關於chemical weathering

why carbonation will occur in some very cold place such as arctic area?

1 個解答

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  • 1 十年前
    最愛解答

    Carbonation is the process in which atmospheric carbon dioxide leads to solution weathering. Carbonation occurs on rocks which contain calcium carbonate such as limestone and chalk. Carbonation takes place when rain combines with carbon dioxide to form a weak carbonic acid which reacts with calcium carbonate (the limestone) and forms calcium bicarbonate. This process speeds up with a decrease in temperature and therefore is a large feature of glacial weathering.

    The reactions as follows:

    CO2

    +

    H2O

    ->

    H2CO3

    carbon dioxide

    +

    water

    ->

    carbonic acid

    H2CO3

    +

    CaCO3

    ->

    Ca(HCO3)2

    carbonic acid

    +

    calcium carbonate

    ->

    calcium bicarbonate

    It will be more active in cold place.

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