Assuming equal concentrations, arrange these solutions by pH.
Fe(CLO4)2 aq
NaCLO4 aq.
K2CO3 aq.
HBr aq.
LiOH aq.
Answer: LiOH > K2CO3 > NaCLO4 > Fe(CLO4)2 > HBr
You want to order them from highest to lowest pH regarding Strong base, weak base, weak acid, strong acid.