Răspunsuri

2014-05-22T13:44:03+03:00
PH= -lg [H3O+] = -lg 10 la -1=>pH=1 pt sol de HBr
pOH= -lg [OH-] = -lg 10 la -3=>pOH=3 
pH=14-pOH=14-3=>pH=11 - pt solutia de NaOH