Question

Which of the following ions will react with water resulting in a change in pH, either acidic, or basic:

	a.	SO32-
	b.	Ba2+
	c.	Zn2+
	d.	Fe3+
	e.	F-
	f.	Cl-
	g.	K+
	h.	Cu2+

Answer 1

Anionic hydrolysis salt solution is basic nature .PH value is greater than 7

PH>7

Cationic hydrolysis salt solution is basic nature. PH value is less than 7

PH<7

a. SO3^2-

SO3^2- + H2O ---------------> HSO3^- + OH^-

basic nature PH>7

b. Ba^2+ + 2H2O ------------> Ba(OH)2 + 2H^+

acidic nature PH <7

c. Zn^2+ + 2H2O ----------------> Zn(OH)2 + 2H^+

acidic nature PH <7

d. Fe^3+ + 3H2O -----------> Fe(OH)3 + 3H^+

acidic nature PH <7

e. F^-   + H2O ---------------> HF + OH^-

basic nature PH>7

f. Cl^- + H2O ----------> HCl + OH^-

   basic nature PH>7

g. K^+ + H2O -------------> KOH + H^+

     acidic nature PH <7

h. Cu^2+ + 2H2O ------------> Cu(OH)2 + 2H^+

acidic nature PH <7