3.13 The Henry's law constant for H₂S is 0.1 mole/

L-atm, and

H₂S (aq) HS + H+

where K₁ = 10-7. If you bubble pure H₂S gas into a

beaker of water, what is the concentration of HS at

a pH of 5 in (a) moles/L, (b) mg/L, and (c) ppmm?