Can you help me with this Suppose you have some acid and you allow the acid to react with water and
you measure the corresponding acid dissociation constant to be 0.00001.
Which of the following is true?
a) The acid is weak and has a pK2 of -5
b) The acid is weak and has a pK2 of 5
c) The acid is strong and has a pK2 of 1/5
d) The acid is strong and has a pK of - 1/5
b)
d)
a)
c)
The correct answer is: b) The acid is weak and has a pK2 of 5
This is because a low acid dissociation constant (Ka) indicates that the acid is weak, and a pKa of 5 corresponds to a Ka of 10^-5, which is consistent with the measured value of 0.00001.