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    Chemical Reaction Questions

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    1. 4CuO(s) + CH4(g) CO2(g) + 4Cu(s) + 2H2O(g)
    The value of Kc for this reaction is 1.10 at 25.0°C. What is the
    value of Kp for this reaction? (R = 0.0821 L-atm/K-mol)

    a. 4.63
    b. 26.9
    c. 658
    d. 37.2
    e. 1.52 x 10-3

    2. At a certain temperature, a flask at equilibrium contains 0.0551 M
    HCl, 0.112 M Cl2, and 0.105 M H2. What is the value of Kc for the
    equilibrium: 2 HCl(g) → Cl2(g) + H2(g)?

    a. 3.87
    b. 0.258
    c. 11.0
    d. 1.63 x 10-5
    e. 0.213

    3. Consider the following incomplete table of data for the equilibrium
    between dinitrogen tetroxide and nitrogen dioxide.

    Exp # Equilibrium N2O4 Concentr Equilibrium NO2 Concentration
    1 0.00140 M 0.0172 M
    2 0.00452 ?
    3 0.00280 0.0243

    From the information in the table, determine the value of the
    missing NO2 concentration at equilibrium.

    a. 0.0309
    b. 0.0486
    c. 9.54 x 10-4
    d. 0.115
    e. 0.0814

    3. Consider the gaseous equilibrium: 2 A → 2 B + C
    Determine the value of the missing B concentration at equilibrium.

    Exp# [A] at equilibrium [B] at equilibrium [C] at equilibrium
    1 0.10 M 0.15 M 0.20 M
    2 0.20 0.50 0.072
    3 0.35 ? 0.15

    a. 0.20
    b. 0.35
    c. 0.61
    d. 0.40
    e. 0.37

    4. The expression for Kc for the reaction below is _______________.
    NiCO3(s) + 2H+(aq) Ni2+(aq) + CO2(g) + H2O(l)

    a. [CO2]
    b. [NiCO3]/[Ni2+]
    c. [Ni2+][CO2]/[H+]2
    d. [Ni2+][H+]2
    e. [Ni2+]/[NiCO3]

    5. Consider the following chemical reaction:
    H2(g) + I2(g) 2HI(g)
    At equilibrium, the concentrations of H2, I2, and HI were 0.15 M,
    0.033 M, and 0.55 M, respectively. The value of Kc for this reaction
    is
    111
    9.0 x 10-3
    6.1
    23
    61

    6. Consider the following reaction:

    PCl5(g) PCl3(g) + Cl2(g)

    Initially, 0.84 mol of PCl5(g) was placed in a 1.0 L flask. At
    equilibrium, 0.72 mol of PCl5(g) was present. The value of Kc for
    this reaction at this temperature is ___________.

    a. 2.0 x 10-2
    b. 0.62
    c. 0.60
    d. 0.12
    e. 0.72

    7. The value of Kc for the reaction below is 0.016. Under a set of
    equilibrium conditions, [HI] = 0.10 M and [H2] = [I2]. Calculate the
    concentration of I2 (M).
    2HI(g) H2(g) + I2(g)

    a. 1.3 M
    b. 3.1 x 10-1
    c. 0.31
    d. 4.0 x 10-2
    e. 1.3 x 10-2

    © BrainMass Inc. brainmass.com April 3, 2020, 2:52 pm ad1c9bdddf
    https://brainmass.com/chemistry/chemical-equilibrium/chemical-reaction-questions-48792

    Solution Summary

    Chemical reaction questions are discussed in a variety of different manors. Reactions under different conditions can analysed on there temperature, and concentrations to determine optimal conditions.

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