Chem 2

posted by .

What is the approximate value of the K for the neutralization of nitrous acid with ammonia? Ka for the acid is 0.00045 and Kb for the base is 0.000018.

Do I multiply Ka*Kb?

  • Chem 2 -

    I think that is the hydrolysis constant which is Kw/(KaKb).

  • Chem 2 -

    Frist write out what is given:
    HNO2 ⇌ H+ + NO2-
    Ka = 0.00045 = [H+]*[NO2-]/[HNO2]
    and:
    NH3 + H2O ⇌ NH4+ + OH-
    Kb = 0.000018 = [NH4+]*[OH-]/[NH3]

    What is asked for is the K value for:
    HNO2 + NH3 ⇌ NH4+ + NO2-

    K = [NH4+]*[NO2-]/{ [HNO2]*[NH3] }
    = { [NH4+]*[OH-]/[NH3] }*{ [H+]*[NO2-]/[HNO2] }/{ [H+]*[OH-] }
    = Kb*Ka/Kw
    where Kw = [H+]*[OH-] = 10^-14.
    Is that very easy? Please finally do the very simple math.

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. Chem

    What is the pH of the resulting solution if 30.00 mL of 0.100M acetic acid is added to 10.00mL of 0.100 M NaOH?
  2. Chemistry

    What is the pH of the solution created by combining 2.00 mL of the 0.10 M base[ammonia] with 8.00 mL of the 0.10 M acid[acid acid]?
  3. chem-acid-base titrations

    Acetic acid (HC2H3O2) is an important component of vinegar. A 10.00mL sample of vinegar is titrated with .5052 M NaOH, and 16.88 mL are required to neutralize the acetic acid that is present. a.write a balanced equation for this neutralization …
  4. chemistry again ..

    haphthalen-2-ol dissolved into sodium hydroxide solution to give another solution B. What would be formed when solution B reacted with phenylamine/nitrous acid mixture , butylamine/nitrous acid mixture and ammonia/ nitrous acid respectively …
  5. Chemistry (reaction with amine)

    Phenol dissolved into sodium hydroxide solution to give another solution A. What would be formed when A reacted with phenylamine/nitrous acid mixture , butylamine/nitrous acid mixture and ammonia/ nitrous acid respectively ?
  6. Chemistry (reaction with amine)

    haphthalen-2-ol dissolved into sodium hydroxide solution to give another solution B. What would be formed when solution B reacted with phenylamine/nitrous acid mixture , butylamine/nitrous acid mixture and ammonia/ nitrous acid respectively …
  7. chem buffer

    When the following solutions are mixed, which will act as a buffer?
  8. Chemistry

    Write the equation for the equilibrium that exists when nitrous acid and sodium acetate are placed in solution together (do not include spectator ions). Using published values for the Ka of nitrous acid and of acetic acid, determine …
  9. Chemistry

    Calculate the percent ionization of nitrous acid in a solution that is 0.311 M in nitrous acid (HNO2) and 0.189 M in potassium nitrite (KNO2). The acid dissociation constant of nitrous acid is 4.50 × 10-4.
  10. Chemistry

    If 16.5 grams of the base were used in the neutralization of *question 7*, how many grams of acid must have been used to neutralize the base?

More Similar Questions