In step 5, you will calculate h+/oh– ratios for more extreme ph solutions. find the concentration of h+ ions to oh– ions listed in table b of your student guide for a solution at a ph = 2. then divide the h+ concentration by the oh– concentration. record these concentrations and ratio in table c. what is the concentration of h+ ions at a ph = 2? mol/l what is the concentration of oh– ions at a ph = 2? mol/l what is the ratio of h+ ions to what is the concentration of h+ ions at a ph = 11?