Christine

Questions

Newest questions posted by Christine
  1. math (pre cal)

    find the domain and range of y=|5x^3+8|-2
  2. Chemistry

    Using the information below, which answer lists the salts in order of increasing solubility? PbSO4 Ksp = 1.6 x 10^-8 PbS Ksp = 8 x 10^-28 PbI2 Ksp = 7.1 x 10^-9 PbCl2 Ksp = 1.6 x 10^-5 a. PbS < PbI2 < PbSO4 < PbCl2 b. PbI2 < PbCl2 < PbS <
  3. Chemistry

    You have the following acids and their conjugate bases available: Acetic Acid: CH 3COOH/CH3COO-; Ka = 1.8 × 10-5 Carbonic Acid: H2CO3/HCO3-; Ka = 4.2 × 10-7 Hydrofluoric acid: HF/F-; Ka = 7.2 × 10-4 Which of these acid/conjugate base pairs would be the
  4. Chemistry

    Given the following acid dissociation constants, which acid has the strongest conjugate base? a. HCN Ka = 6.2 x 10-10 b. HOCl Ka = 3.0 x 10-8 c. HIO3 Ka = 0.17 I believe the answer is HCN it has the lowest Ka and is the weakest acid.
  5. Chemistry

    If K > 1 at 25°C and 1 atm of pressure, then which statement is true about the reaction's equilibrium? a. There is always more reactant than product at equilibrium under all conditions. b. There is more product than reactant at equilibrium at these

Responses

Newest responses posted by Christine
  1. Chemistry Help!!

    11293J
  2. Chemistry

    HCN Kb = 1.0 x 10^-14/6.2 x 10^-10 = 1.61 x 10^-5 HOCl Kb = 1.0 x 10^-14/3.0 x 0^-8 = 3.3 x 10^-7 HIO3 Kb = 1.0 x 10^-14/.17 = 5.88 x 10^-14 The strongest Kb appears to be HCN. Is this correct?
  3. Chemistry

    i think the answer is A because it's pKa is the closest to pH 4.5.
  4. Chemistry

    I believe it is A. Qc = (0.15)^2/0.5 = 0.045 Kc = 0.0044 Qc > Kc so it is not in equilibrium and will go in the reverse direction I believe?
  5. Chemistry

    7.1 x 10^-9 = x * (0.4M)^2 (7.1 x 10^-9)/.16 = x 4.4 x 10^-8 = x is this the correct way to solve this problem?