a. At what pH will 99% of a compound with a pKa of 8.4 be in its

Question:

a. At what pH will 99% of a compound with a pKa of 8.4 be in its basic form?
b. At what pH will 91% of a compound with a pKa of 3.7 be in its acidic form?
c. At what pH will 9% of a compound with a pKa of 5.9 be in its basic form?
d. At what pH will 50% of a compound with a pKa of 7.3 be in its basic form?
e. At what pH will 1% of a compound with a pKa of 7.3 be in its acidic form?