Phenobarbital, a weak acid and a commonly used the hypnotic-sedative drug has a pka value equal to 6.22 and a molecular weight of 232 grams/mole. 0.4884 gm of Phenobarbital was dissolved in 100 ml of distilled water and labeled solution P.
1. Determine the molarity (M) of Phenobarbital in the solution.
2. Determine the pH of solution P.