# phosphonic acid is diprotic or monoprotic

Example $$\PageIndex{1}$$: Ionization of a Diprotic Acid When we buy soda water (carbonated water), we are buying a solution of carbon dioxide in water. Problem 132 A 0.867 -g sample of an unknown acid requires 32.2 $\mathrm{mL}$ of a 0.182 $\mathrm{M}$ barium hydroxide solution for neutralization. A monoprotic acid is that acid which will produce just one hydrogen (H+) when dissolved in water, like HCl or HNO3. Polyprotic acid are able to donate more than one proton per acid molecule, in contrast to monoprotic acids that only donate one proton per molecule. A Monoprotic acid is an acid that only has one hydrogen atom for each acid molecule. Chem 1B Dr. White 68# with#one#mole#of#base.#If#the#acid#is#polyprotic,# the#titration#curve#willcontain#more#than#one# S 1, then the unknown acid should result in a diprotic or triprotic acid. 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