The normal rain water is slightly acidic and its pH value is 5.6 because of which one of the following ?

Question

The normal rain water is slightly acidic and its pH value is 5.6 because of which one of the following ? (A) CO 2+ H 2 O arrow H 2 CO 3 (B) N 2 O 5+ H 2 O arrow 2 HNO 3 (C) 2 SO 2+ O 2+2 H 2 O arrow 2 H 2 SO 4 (D) 4 NO 2+ O 2+2 H 2 O arrow 4 HNO 3

Tardigrade Admin · Accepted Answer

We are aware that normally rain water has a

p H

of

5.6

due to the presence of

H^{+}

ions formed by the reactions of rain water with carbon dioxide present in the atmosphere.

H_{2} O (l) + C O_{2} (g) ⇋ H_{2} C O_{3} (a q)

H_{2} C O_{3} (a q) ⇋ H^{+} (a q) + H C O_{3}^{-} (a q)

Q. The normal rain water is slightly acidic and its $p H$ value is $5.6$ because of which one of the following ?

$C O_{2} + H_{2} O \to H_{2} C O_{3}$

$N_{2} O_{5} + H_{2} O \to 2 H N O_{3}$

$2 S O_{2} + O_{2} + 2 H_{2} O \to 2 H_{2} S O_{4}$

$4 N O_{2} + O_{2} + 2 H_{2} O \to 4 H N O_{3}$

We are aware that normally rain water has a $p H$ of $5.6$ due to the presence of $H^{+}$ ions formed by the reactions of rain water with carbon dioxide present in the atmosphere.
$H_{2} O (l) + C O_{2} (g) ⇋ H_{2} C O_{3} (a q)$
$H_{2} C O_{3} (a q) ⇋ H^{+} (a q) + H C O_{3}^{-} (a q)$

Q. The normal rain water is slightly acidic and its pH value is 5.6 because of which one of the following ?

CO2​+H2​O→H2​CO3​

N2​O5​+H2​O→2HNO3​

2SO2​+O2​+2H2​O→2H2​SO4​

4NO2​+O2​+2H2​O→4HNO3​