Buffer Chemistry Question! Please help!?
1) Find the pH of a solution that is 0.12 M in nitrous acid and 0.15 M in sodium nitrate. Answer in units of pH. (Ka of nitrous acid = 4.5 x 10^-4)
2)Now we add 0.15 mol of NaOH to 1.00 liter of the solution that was given in part 1. What is the pH of the solution after the NaOH addition?
3)Now, you're given only 500 mL of the buffer described in part 1 above. To this, 121 mL of 0.50 M HCl is added. What is the new pH of this new solution?