Question

question 1: For a strong acid with an initial solution concentration of 0.065 M, what do you think will be the approximate concentration of acid molecules, the hydronium ions, and the conjugate base ions?

Question 2: For a weak acid, why is it not possible to make the same assumptions about the final product and reactant concentrations of a strong acid?

Answer 1

1]

Strong acid fully dissociates in water

So

HA ---> H+ + A-

0.065 0 0

0 0.065 0.065

Concetration of acid molecules will be zero as the acid exists in ionic form

COncentration of hydronium ions = initial concentration of acid = 0.065 M

Concentration of Conjugate base also equal to concentration of initial acid = 0.065 M

2]

Weak acid doesnt dissociate completely in water

So we cant say how much percent it dissociates in water ..

HA -----------> H+ + A-

0.065 0 0

0.065-x x x

So here dissociation depends on the how much the acid is stronger