Question

What concentration of acetic acid (K_a = 1.80 × 10^–5) has the same pH as that of 5.00 × 10^–3 M HCl?

a) 3.60 × 10^–3 M 

b) 5.00 × 10^–3 M 

c) 1.39 M 

d) 5.00 M 

e) none of these

Answer 1

The same pH as that of 5.00 × 10^–3 M HCl = 1.39 M .