posted by Anonymous

1. Calculate the concentration of H3O+, HC2O4-1, and oxalate ion (C2O42-) in a 0.175 M solution of oxalic acid (C2H2O4).
[For oxalic acid, Ka1 = 6.5 ´ 10-2, Ka2 = 6.1 ´ 10-5.]

  1. DrBob222

    .......H2C2O4 + H2O --> H3O^+ + HC2O4^-

    Substitute the E line into Ka1 expression and solve for x = (H3O^+) = (HC2O4^-).

    That gives you H3O^+ and HCO4^- and note they are equal. It also gives (H2C2O4). That leaves C2O4^2-

    .......HC2O4^- + H2O ==> H3O^+ + C2O4^2-
    Ka2 = (H3O^+)(C2O4^2-)/(HC2O4^-)
    Since (H3O^+) = (HC2O4^-), then (C2O4^2-) = ka2.

Respond to this Question

First Name

Your Answer

Similar Questions

  1. Chemistry

    Oxalic acid is a relatively strong diprotic acid with Ka1 = 5.6 ´ 10-2 and Ka2 = 5.1 ´ 10-5. What is the oxalate ion, C2O42-, concentration in a 0.10 M oxalic acid solution?
  2. chem

    sorry . Can you please help me with this questions If you know?

    1. What is the amount of oxalate in 2 mL of 0.035M solution?
  4. chemistry

    oxalic acid, h2c2o4, is a weak acid capable of providing two H3O+ ions. ka=.059 k2=6.4E-5 the [h3o]+ in a .38 M solution of h2c2o4 is .12M and can be calculated by the first ionization step only. what is the equilibrium concentration …
  5. chemistry

    Calculate the concentration of oxalate ion (C2O42−) in a 0.175 M solution of oxalic acid (C2H2O4). [For oxalic acid, Ka1 = 6.5 × 10−2, Ka2 = 6.1 × 10-5.]
  6. science

    What is the hydroxide-ion concentration of a 0.240 M oxalic acid, H2C2O4, solution?
  7. Chemistry

    What is the hydroxide ion concentration of a 0.370M oxalic acid, H2C2O4, solution?
  8. chemistry

    what is the hydronium ion concentration of a 0.35M oxalic acid, H2C2O4. solution?
  9. Chemistry

    How do you find the Ka1 and Ka2 of oxalic acid when it is in a solution that is 1.05 M H2C2O4 and has a pH of 0.67. [C2O4^2-] = 5.3x10^-5 M. I have tried using an ICE table for both reactions, as oxalic acid is a diprotic acid, but …
  10. Chemistry

    Oxalic acid, found in the leaves of rhubarb and other plants, is a diprotic acid. H2C2O4 + H2O ↔ H3O+ + HC2O4- Ka1= ?

More Similar Questions