Equilibria of Other Important Atmospheric Gases

Hydrogen Peroxide Hydrogen peroxide is soluble in water with a Henry s law constant HHio2 = 1 x 105 M atm-1 at 298 K. It dissociates to produce H02 

FIGURE 7.12 Equilibrium fraction of total hydrogen peroxide in the aqueous phase as a function of cloud liquid water content at 298 K. 

Oxides of Nitrogen Nitric oxide (NO) and nitrogen dioxide (N02) are also characterized by small solubility in water (Henry s law coefficients 0.002 and 0.01 Matm-1 at 298 K). A negligible fraction of these species is dissolved in cloudwater, and their aqueous-phase concentrations are estimated to be on the order of 1 nM or even smaller. 

Formaldehyde Formaldehyde, upon dissolution in water, undergoes hydrolysis to yield the gem-diol, methylene glycol 

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