استثناء للقاعده اللي فوق لأن هو المثال الوحيد اللي مش متاماشي معاها Phenobarbitone دكتور هو هنا 
Phenobarbitone is not an exception. Phenobarbitone is a weak acid (despite the fact that its pka is above 7). pKa has nothing to do with acidity and basicity.
Got it. Thank you for your reply prof.