Sulphates which are insoluble in water are :
Which of the following sulphates are insoluble in water?
Name :
(a) a chloride which is insoluble in cold water but dissolves in hot water,
(b) a chloride which is insoluble,
(c) two sulphates which are insoluble,
(d) a basic salt,
(e) an acidic salt,
(f) a mixed salt,
(g) a complex salt,
(h) a double salt,
(i) a salt whose solubility increases with temperature,
(j) a salt whose solubility decreases with temperature.
Sodium sulphate is soluble in water but barium sulphate is insoluble because