Question #4a869

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Question #4a869

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Answer 1 · 2015-11-02T01:49:46

$H_2O$ ( $l$ ) + $CO_2$ ( $g$ ) = $H_2CO_3$ ( $aq$ )
$H_2O$ ( $l$ ) + $H_2CO_3$ ( $aq$ ) = $HCO_3^-$ ( $aq$ ) + $H_3O^+$ ( $aq$ )

Explanation:

Natural rainwater is already slightly acidic (pH 5.6) due to the presence of $CO_2$ in our system (the air that we, humans and animals alike, breathe out and also, a product of organic decomposition).

But the slightly acidic condition is further aggravated by the presence of industrial pollutants like sulfur dioxide ( $SO_2$ ) and nitrogen oxides ( $NO_x$ ), to say the least.

So not only does the above chemical formula to describe acid rain, but you can also use these formulas:

$H_2O$ ( $l$ ) + $SO_3$ ( $g$ ) = $H_2SO_4$ ( $aq$ )

$H_2O$ ( $l$ ) + $2NO_2$ ( $g$ ) = $HNO_3$ ( $aq$ ) + $HNO_2$ ( $g$ )

Combination of all these acids in our atmosphere can bring about acid rain.

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Question #4a869

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