following substances? During lab you measured the pH of common household items. Write net Bronsted equations that show the acidic or basic nature of the following substances, given the pH. For polyprotic acids, please only show one proton transfer. Remember that spectator ions are not included.


a) coffee (quinic acid = HC7H11O6) with a pH = 4.70


b) native lime (calcium oxide) with a pH = 10.50


c) lithium hydrogensulfide, an amphiprotic species with a pH = 9.90