Chemistry

posted by .

An aqueous solution contains 0.216 M ascorbic acid (H2C6H6O6) and 0.131 M hydrochloric acid.

Calculate the ascorbate (C6H6O62-) ion concentration in this solution.

[C6H6O62-] =______________ mol/L.

  • Chemistry -

    Ascorbic acid = HAsc
    .........HAsc ==> H^+ + Asc^-
    initial.0.216.....0......0
    change....-x.......x......x
    equil..0.216-x.....x.......x

    ..........HCl ==>H^+ + Cl^-
    initial...0.131..0......0
    change...-0.131..0.131..0.131
    equiol....0......0.131..0.131

    Write the Ka expression for HAsc
    K = (H^+)(Asc^-)/(HAsc)
    For (H^+) substitute x + 0.131 (x from the HAsc equil + 0.131 from the HCl equil).
    For (Asc^-) substitute x
    For (HAsc) substitute 0.216-x
    Solve for x.

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. chemistry

    Ascorbic acid is a weak organic acid also known as vitamin C. A student prepares a 0.20 mol/L aqueous solution of ascorbic acid and measures its pH as 2.40. Based on this evidence, what is the Ka of ascorbic acid?
  2. Chem

    Ascorbic acid, H2C6H6O6, is a diprotic acide with a K1= 7.9 E-5 and a K2=1.6E-12. In a .005 M aq solution of ascorbic acid which of the following species is present in the lowest concentration. 1. H2O 2. H3O 3. H2C6H6O6 4. HC6H6O6 …
  3. chem

    Ascorbic acid, H2C6H6O6, is a diprotic acide with a K1= 7.9 E-5 and a K2=1.6E-12. In a .005 M aq solution of ascorbic acid which of the following species is present in the lowest concentration. 1. H2O 2. H3O+ 3. H2C6H6O6 4. HC6H6O6- …
  4. chem

    Ascorbic acid, H2C6H6O6, is a diprotic acide with a K1= 7.9 E-5 and a K2=1.6E-12. In a .005 M aq solution of ascorbic acid which of the following species is present in the lowest concentration. 1. H2O 2. H3O+ 3. H2C6H6O6 4. HC6H6O6- …
  5. chemisrty

    Q1) A solution of ascorbic acid (C6H8O6, Formula mass = 176 g/mol) is made up by dissolving 80.5 g of ascorbic acid in 210 g of water, and has a density of 1.22 g/mL at 55 oC. Calculate the following: a) the mass percentage of ascorbic …
  6. chem 2

    What is the pH of a solution that consists of 0.50M H2C6H6O6(ascorbic acid) and 0.75M NaHC6H6O6(sodium ascorbate)?
  7. Chemistry(Please help)

    Calculate the concentration of HC6H6O6- in an aqueous solution of 0.0851 M ascorbic acid, H2C6H6O6 (aq). I do not know how to start this
  8. Chemistry

    An aqueous solution contains 0.196 M hydrosulfuric acid and 0.190 M hydrochloric acid. Calculate the sulfide ion concentration in this solution. [S2-] = _________mol/L.
  9. Chemistry

    1. An aqueous solution contains 0.154 M ascorbic acid (H2C6H6O6) and 0.196 M hydrobromic acid. Calculate the ascorbate (C6H6O62-) ion concentration in this solution. Can you explain how to do this please?
  10. Chemistry

    How do I do this problem, I am very confused on how to even begin: An aqueous solution contains 0.167 M ascorbic acid (H2C6H6O6) and 0.194 M hydroiodic acid. Calculate the ascorbate (C6H6O62-) ion concentration in this solution. [C6H6O62-] …

More Similar Questions