I am facing a challenge in adjusting a pH 2 solution to pH 8,5 using NaOH. 

How should I proceed by calculations? What concentration and volume should use if the concentration of the NaOH given is 2M?

Thank you for your prom response and guidance!

Hi all,
I have a problem for which I was given the solution but not the way it was worked out, and my answers don't match.

The problem in question:

Calculate the pH of a solution that contains 0.00017g OH- per 100 mL.
The solution should be 9.

The way I am trying to work it out (please help me figure out where I went wrong)

Step 1: Convert g per 100mL into g/L:
0.00017 g per 100 mL = 0.0017 g/L

Step 2: convert g/L of OH- into m/L
mM of OH = 17
mass = 0.0017g
Therefore: 0.00

Afternoon everyone, I'm looking into the equilibrium of SO2 + H2O <-> H3O + HSO3 at low pH (ranging from 3.0 to 4.0).

I have two questions:
Firstly, how can I finely control the pH to be at intervals of say, 0.2?
Secondly, I could not find a method to determine the equilibrium point, beyond spectrophotometry in the UV range which is beyond our school's lab equipment. Any ideas on how to achieve this?

If this is not feasible, could anyone suggest some tangentially related experiments th