1)
pH = -log(H^+)
2)
pH = -log(H^+)
3)
pOH = -log(OH^-)
1. Find the pH of a solution whose [H3O+] is 9.5 X 10^ -8 M.
2. What is the [H3O+] concentration of a solution with a pH of 5.45?
3. What is the pOH of a solution with a [OH -] concentration of 2.97 X 10^ -10 M?
3 answers
is this right?
-log(concentration of h3o+ or h+)
ph= -log(9.5*10^-8)
1) 7.022
-log(concentration of h3o+ or h+)
ph= -log(9.5*10^-8)
1) 7.022
right. Very good. But I would round it to 7.02. You have two significant figures in 9.5E-8 so you are allowed just two in 7.02 (since it's a log the 7 doesn't count as a significant figures).
1 answer