Respuesta :

p

K

a

=

5.4

pH

=

3.7

Explanation:

p

K

a

is simply  

−

log

10

(

K

a

)

. It is a constant at any temperature and does not depend on the molarity of the solution.

p

K

a

=

−

log

10

(

K

a

)

=

−

log

10

(

4.0

×

10

−

6

)

=

5.4Explanation:
It is 5.4 I got the answer because of the guy on top