How to calculate pH of HCl in water?

Calculate pH and pOH?

• What is the pH of a 0.240 molar HBr solution? Kw changes for a sample of water when there is a change in which of the following conditions? (Select all that apply.) 1 temperature [H+] [OH-] pressure What is the pH of a 0.058 molar Ba(OH)2 solution? What is the pH of a 0.39 molar KOH solution? Calculate the molarity of an aqueous solution of HCl if its pH is measured and found to be 4.00. What is the pH of a solution made by mixing 4.10 mL of 0.0058 molar Sr(OH)2 with 7.20 mL of 0.0049 molar Sr(OH)2 solution? As 50.0 mL of 0.10 M NaOH is added to 100.0 mL of 0.5 M NaOH, what happens to the pH of the original solution? Calculate the molarity of an aqueous solution of NaOH if its pH is measured and found to be 11.00.

• Answer:

  1) pH = -log([H+]) = -log(0.24) = 0.620 2) Temp & pressure 3) pOH = -log(2 * 0.058) = 0.936. pH = 14 - 0.936 = 13.06 4) pOH = -log(0.39) = 0.409. pH = 14 - 0.409 = 13.59 Can't be bothered to do the rest...sorry, I'm only human.