Question

Which of the following will be more soluble in acidic solution than in pure water? AgCl Sn(OH)_2 CaSO_4 KCIO_4 CaCO_3

Answer 1

Acidic solution --> implies H+ presence

some equilbirium will form with H+

a)

AgCl <-> Ag++ Cl-

No effect

b)

Sn(OH)2 + 2H+ <-> Sn2+(aq) + H2O(l)

solubility increases

c)

CaSO4 <-> Ca2+ + SO4-2

H+ + SO4-2 <-> HSO4-

this shifts the equilbirum slightly

therefore, solubliity of CASO4 increases

d)

KClO4 --< K+ +ClO4-

no effect/no equilbiriums formed

e)

CaCO3 <-> Ca+2 + CO3-2

CO3-2 + H+ <-> HCO3- forms

then, the equilbirium shifts

this favours higher solubility

from the list:

Sn(OH)2 ; CaCO3 > and CaSO4 will increase solubility