Answer:
FeCl3 - acidic
K2CO3 - basic
NH4Br- acidic
KClO4 - neutral
Explanation:
This question is drawing our attention to solvation.
When a salt is formed from a weak acid and a strong base, then the salt solution will be basic. For instance. K2CO3 is formed from a weak acid H2CO3 and a strong base KOH. A solution of K2CO3 is basic.
Similarly, when a salt is formed from a strong acid and a weak base, the salt is acidic, Eg NH4Br
Lastly, a salt formed from a strong acid and a strong base is found to be neutral in solution.
