Question

Predict whether the following substances will give acidic, basic, or neutral solutions.
A.${{\text{K}}_{\text{2}}}\text{C}{{\text{O}}_{\text{3}}}$
B.$\text{NaCl}$
C.$\text{FeC}{{\text{l}}_{\text{3}}}$
D.$\text{CuS}{{\text{O}}_{\text{4}}}$
E.$\text{AlC}{{\text{l}}_{\text{3}}}$
F.$\text{N}{{\text{H}}_{\text{4}}}\text{Cl}$
G.$\text{C}{{\text{H}}_{\text{3}}}\text{COON}{{\text{H}}_{\text{4}}}$
H.$\text{NaCN}$
I.$\text{N}{{\text{a}}_{\text{2}}}\text{S}$
J.$\text{N}{{\text{a}}_{\text{2}}}{{\text{B}}_{\text{4}}}{{\text{O}}_{\text{7}}}$

Answer 1

The nature of the salt, i.e., it will be acidic or basic and will depend on the nature of the acid and the base from which it is prepared. The pH of the acidic solution is less than 7 while the basic solution is more than 7.The neutral solution has a pH of 7.
Complete Step by step answer: A.The first salt, potassium carbonate is prepared from a strong base potassium hydroxide and a weak acid carbonic acid, hence it will be basic in nature.
B.Sodium chloride will be neutral in nature as it is the neutralization product of a strong acid, hydrochloric acid, and a strong base, sodium hydroxide.
C.Ferric chloride will be acidic because it is a salt of strong hydrochloric acid and weak ferric hydroxide.
D.Copper sulphate will be acidic as it is a salt of strong sulphuric acid and weak cupric hydroxide.
E.Aluminium chloride will be mildly acidic because it is a salt of strong hydrochloric acid and amphoteric aluminium hydroxide.
F.Ammonium chloride is also acidic because it is a salt of strong hydrochloric acid and weak ammonium hydroxide.
G.Ammonium acetate will be neutral in nature as it is a salt of a weak acid and a weak base.
H.Sodium cyanide will be basic in nature as it is a salt of strong base sodium hydroxide and weak acid hydrogen cyanide.
I.Sodium sulphide is a basic salt because it is a salt of strong base sodium hydroxide and weak hydrogen sulphide.
J.Borax is again basic in nature.
Note: The nature of the salt depends on the natures of the acid and the base from which it has been created. Because the salts hydrolyse in water to make it either acidic or basic. Higher amount hydronium ions make the solution acidic while high levels of hydroxyl ions make the solution basic.