College Basic Chemistry Exercise: Solve the concentration of sulfur ions with the mixed solution of H2S and hydrochloric acid.
The first-order and second-order dissociation constants are 1.07 * 10-7,1.26 *10-/3, respectively. K =1.07 *10-7 *10-13 =1.35 *10-20. H+=0.3mol/L in the charge conservation formula can be ignored, and S2-=1.22 *10-21is calculated.