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38. A degree of dissociation of Al₂(SO₄)₃ is 25% in a sclvent, then 
(1) Normal boiling point = experimental boiling point 
(2) Normal osmotic pressure = 2 x experimental osmotic pressure 
(3) NormaI molecular weight = 2 x experimental molecular weight 
(4) Normal freezing point = $\frac{1}{4}$ x experimental freezing point