Lab?Report? Sania?Hussain? Introduction? According?to?the?arrhenius?acid?theory,?an?arrhenius?acid?is?a?substance?that?produces? hydrogen?ions?as?the?only?positive?ions?in?the?solution.?While?the?Bronsted?Lowry?acid?theory? states?that?an?Bronsted?Lowry?acid?donates?a?proton.?Based?on?these?two?theories?an?acid?can?be? defined?as?a?substance?that?produces?positive?hydrogen?ions?in?an?aqueous?solution?and?is?a? proton?donor?(?DeCoste?130?.)?An?acid?s?pH?level?is?below?seven.?Some?examples?of?acids? include:?hydrochloric?acid?(HCl),?ethanoic?acid?(CH? 3? COOH),?or?things?like?vinegar?and?lemons.? A?base?however?is?the?opposite.?An?arrhenius?base?produces?hydroxide?ions?as?the?only?negative?