posted by .

what is the hydronium-ion concentration in a 0.35m solution of NaCO3? For carbonic acid, Ka1=4.2x10^-7 and Ka2=4.8x10^-11. (Kw=1.0x10^-14)

  • Chemistry -

    I'm sure you mean 0.35M solution. Do you know that 0.35M and 0.35m are not the same? This is a hydrolysis problem.
    ........CO3^2- + HOH ==> HCO3^- + OH^-

    Kb for CO3^- = (Kw/k2 for H2CO3) = (x)(x)/(0.35-x). Substitute and solve for x = (OH^-) an convert to pH.

  • Chemistry -

    Why is the last step is convert to pH? We are trying to find the hydroxide-ion concentration?not the pH

  • Chemistry -

    Nvm figured it out

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. Chemistry

    Which of the following can we predict from an equilibrium constant for a reaction?
  2. Chemistry

    0.10 M solution of a weak monoprotic acid has a hydronium-ion concentration of 5.0 * 10^-4 M. What is the equilibrium constant, Ka, for this acid?
  3. Chemistry

    What is the hydronium ion concentration in a 0.010M solution of carbonic acid, H2CO3?
  4. Chemistry

    What is the concentration of CO3^-2 in a 0.028M solution of carbonic acid, H2CO3?
  5. Chemistry

    What is Kc for the following equilibrium?
  6. Chemistry

    What is the hydronium ion concentration of a buffer solution that is 0.10M NaHPO4 and 0.50M NaH2PO4?
  7. chemistry

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

    Determine the concentration of CO32- ions in a 0.18 M H2CO3 solution. Carbonic acid is a diprotic acid whose Ka1 = 4.3 × 10-7 and Ka2 = 5.6 × 10-11.
  9. General Chemistry

    Carbonic acid forms when carbon dioxide dissolves in water. A typical can of soda contains a 0.120 M solution of CO2. Assuming that all dissolved CO2 is present as carbonic acid, and that no other substances dissolved in solution affect …
  10. Chemistry

    Phthalic acid, H2C8H404, is a diprotic acid used in the synthesis of phenolphthalein indicator. Ka1= 1.2x 10^-3, and Ka2 = 3.9 x 10^-6. a) Calculate the hydrongen-ion concentration of a .015 M solution. b) What is the concentration …

More Similar Questions