3. H2S(aq) dissociates in two steps according to the reactions below. The equilibrium constants at 25C and 1 bar are shown. H2S(aq)=H++HSHS=H++S2Kal=107Ka2=1012.9 Based on the work we did in class, draw a representative of the Bjerrum plot for this system (plot the log activity of the three sulfide species as a function of pH ) assuming that total sulfide (S2=mHHS+mHSH+mS2) is 0.005mol/L and activities are equal to concentrations. Be sure to indicate the pH values of interest on your plot a. Calculate the log activity of S2,HSand H2S at pH=4 b. Calculate how H2S changes with pH for the following conditions: (i) for 813. I'm looking for the equation of a line in each case