Chemistry

posted by .

What will be the pH of:
(a)10.0cm3 of an aqueous solution of 0.001mol dm^-3 nitric aicd, HNO3 (aq)?
(b)100cm3 of an aqueous solution of 0.001mol dm^-3 nitric aicd, HNO3 (aq)?
(c)0.02mol dm^-3 of potassium hydroxide solution, KOH (aq)?

For (a) I got 2, (b) 1 and (c) 12.31.
I am not sure if these are right. I used pH=-log[H+]/pH-log[OH-]. How is the volume used?

Thank you in advance for any help!

  • Chemistry -

    c is correct except I obtained 12.3.
    I THINK the mistake you are making is you are getting confused with the volume.
    a. It doesn't matter how much of the 0.001 M HNO3 you have, it still is 0.001 M; therefore, the pH = - log(H) = -log (10^-3) = 3.

    b. same concn; therefore, same pH.

    c. 0.02 M KOH means 0.02 M OH.
    pOH = -log(0.02) = -(-1.699)= 1.699 = 1.7 and 14-1.7=12.3

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. chemistry

    A commercial sample of concentrated aqueous nitric acid (HNO3) is 18.2% nitric acid base mass and has a density of 1.12 g/mL. (a) What is the molarity (M) of the HNO3 solution?
  2. chemistry

    26.5 moles of a .2 M aqueous solution of NaOH is required to titrate 50 ml of an aqueous solution of HNO3, what is the concentration of HNO3. I don't want the answer, I want to know how to do it.
  3. chemistry

    26.5 moles of a .2 M aqueous solution of NaOH is required to titrate 50 ml of an aqueous solution of HNO3, what is the concentration of HNO3. I don't want the answer, I want to know how to do it.
  4. chemistry(Urgent Please help)

    A student is asked to standardize a solution of barium hydroxide. He weighs out 0.945 g potassium hydrogen phthalate (KHC8H4O4, treat this as a monoprotic acid). It requires 33.9 mL of barium hydroxide to reach the endpoint. A. What …
  5. General Chemistry

    I add 5 drops Potassium Iodide (KI) to 5 drops lead nitrate (PbNO3). The solution is centrifuged and the aqueous layer is discarded. I then add 5 drops of nitric acid (HNO3), 5 drops of hydrogen peroxide and 10 drops of dichloroethane …
  6. chemistry

    The molarity of an aqueous solution of barium hydroxide is determined by titration against a 0.335 M nitric acid solution. If 32.8 mL of the base are required to neutralize 21.5 mL of nitric acid, what is the molarity of the barium …
  7. chemistry

    An aqueous solution of nitric acid is standardized by titration with a 0.121 M solution of calcium hydroxide. If 24.5 mL of base are required to neutralize 15.4 mL of the acid, what is the molarity of the nitric acid solution?
  8. Chemistry

    If a rate of 80.0 mL of an aqueous solution of potassium hydroxide concentration of 0.25 mol / L are partially neutralized by 20.0 mL of an aqueous solution of nitric acid concentration of 0.50 mol L. Determine pH of the final solution. …
  9. Chemistry

    The nitric acid was purchased as a solution that has 70% HNO3. That volume (mL) of this solution is necessary for preparing 250 mL Solution 2.0 mol L-1?
  10. Chemistry

    An 8 Molar (aqueous) solution contains H2O and HNO3. The solution has an S.G. of 1.24 at 25oC. HNO3 is a strong acid that completely dissociates in water. a) Calculate the mass of I Litre of solution. b) Calculate the mass concentration …

More Similar Questions