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Carbon dioxide becomes acidic when dissolved in water, forming carbonic acid and releasing hydrogen ions, making it weakly acidic.
Carbon dioxide (CO2) is considered an acidic gas because when it dissolves in water, it forms carbonic acid (H2CO3), which gives off hydrogen ions (H+), leading to an acidic solution.
This weakly acidic property of CO2 is vital in natural environments and contributes to phenomena like slightly acidic rainwater in nonpolluted regions, impacting natural water bodies.
Unlike strong acids like hydrochloric acid (HCl) that completely dissociate in water, producing H+ ions, carbonic acid from CO2 dissociates only partially, making CO2 a weak acid.
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