Question

Which aqueous solution is most acidic?

• A. 0.5 M NaNO3
• B. 1 M K₂CO3
• C. 0.1 M FeCl3
• D. 0.01 M NaCN

Answer 1

Answer:

C. 0.1 M FeCl3

• Ferric chloride that is FeCl3 is a salt of weak base and strong acid .

• So aqueous solution of ferric chloride gives precipitate of ferric hydroxide and hydro chloric acid .

• Since , Fe ( OH )3 is a very weak base .