16. Chemical Equilibrium
Equilibrium Constant Calculations
16. Chemical Equilibrium
Equilibrium Constant Calculations - Video Tutorials & Practice Problems
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concept
Equilibrium Constant Calculations
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2
Problem
ProblemThe reaction: 2 NO(g) + Br2(g) ⇌ 2 NOBr(g), has a Kp of 2.5 x 102 at 35°C. Calculate the equilibrium concentration of NOBr, if equilibrium concentrations of NO and Br2 are 0.2 atm and 0.050 atm, respectively.
A
2 atm
B
0.7 atm
C
1 atm
D
0.5 atm
3
Problem
ProblemFor the reaction below, Kc = 1.5 at a constant temperature. A 3.2 L flask contains an equilibrium mixture of 3 compounds: 3.7 g of NH4HS, 70. g of NH3 and unknown amount of H2S. What is the mass (grams) of H2S produced at equilibrium?
NH4HS(s) ⇌ NH3(g) + H2S(g)
A
12.4 g H2S
B
433 g H2S
C
130 g H2S
D
210 g H2S
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Additional resources for Equilibrium Constant Calculations
PRACTICE PROBLEMS AND ACTIVITIES (27)
- The diagram shown here represents the equilibrium state for the reaction A21g2 + 2 B1g2 Δ 2 AB1g2. (a) Assumin...
- The following equilibria were attained at 823 K:CoO(s) + H2(g) → Co(s) + H2O(g) Kc = 67CoO(s) + CO(g) → Co(s) ...
- Calculate the value of the equilibrium constant at 427 °C for the reactionNa O1s2 + 1>2 O 1g2 ∆ Na O 1s2giv...
- Ethene (C2H4) can be halogenated by this reaction: C2H4(g) + X2(g) ⇌ C2H4X2(g) where X2 can be Cl2 (green), Br...
- The equilibrium 2 NO1g2 + Cl21g2 Δ 2 NOCl1g2 is established at 500 K. An equilibrium mixture of the three gase...
- Phosphorus trichloride gas and chlorine gas react to form phosphorus pentachloride gas: PCl31g2 + Cl21g2 Δ PCl...
- Consider the reaction: N (g) + 3H (g) ⇌ 2NH (g) Complete the table. Assume that all concentrations are equilib...
- Consider the following reaction: H2(g) + I2(g) ⇌ 2 HI(g) Complete the table. Assume that all concentrations ar...
- Consider the reaction: 2NO(g) + Br2(g) ⇌ 2NOBr(g) Kp = 28.4 at 298K In a reaction mixture at equilibrium, the ...
- Consider the reaction: SO2Cl2(g) ⇌ SO2(g) + Cl2(g) Kp = 2.91*10^3 at 298 K In a reaction at equilibrium, the p...
- Consider the interconversion of A molecules (red spheres) and B molecules (blue spheres) according to the reac...
- At 900 K, the following reaction has Kp = 0.345: 2 SO21g2 + O21g2 Δ 2 SO31g2 In an equilibrium mixture the p...
- The following picture represents the equilibrium state for the reaction 2 AB ∆ A2 + B2. Which rate constant i...
- At 373 K, Kp = 0.416 for the equilibrium 2 NOBr1g2 Δ 2 NO1g2 + Br21g2 If the pressures of NOBr(g) and NO(g) ...
- At 218 C, Kc = 1.2 * 10-4 for the equilibrium NH4SH1s2 Δ NH31g2 + H2S1g2 Calculate the equilibrium concentra...
- At 80 C, Kc = 1.87 * 10-3 for the reaction PH3BCl31s2 Δ PH31g2 + BCl31g2 (b) If the flask has a volume of 0.25...
- At 80 C, Kc = 1.87 * 10-3 for the reaction PH3BCl31s2 Δ PH31g2 + BCl31g2 (a) Calculate the equilibrium concent...
- At 25 C, the reaction CaCrO41s2ΔCa2+1aq2 + CrO4 2-1aq2 has an equilibrium constant Kc = 7.1 * 10-4. What ar...
- The value of Kc for the reaction 3 O21g2 ∆ 2 O31g2 is 1.7 * 10-56 at 25°C. Do you expect pure air at 25 °C to ...
- An equilibrium mixture of N2, H2, and NH3 at 700 K con- tains 0.036 M N2 and 0.15 M H2. At this temperature, K...
- The value of Kc for the reaction of acetic acid with ethanol is 3.4 at 25°C: CH3CO2H1soln2 + CH3CH2OH1soln2 ∆ ...
- In Section 11.5, we defined the vapor pressure of a liquid in terms of an equilibrium. (b) By using data in A...
- In Section 11.5, we defined the vapor pressure of a liquid in terms of an equilibrium. (c) What is the value ...
- Consider the reaction of chloromethane with OH- in aque- ous solution: CH Cl1aq2 + OH-1aq2 ∆kf CH OH1aq2 + Cl...
- Consider the sublimation of mothballs at 27 °C in a room having dimensions 8.0 ft * 10.0 ft * 8.0 ft. Assume t...
- Consider the sublimation of mothballs at 27 °C in a room having dimensions 8.0 ft * 10.0 ft * 8.0 ft. Assume t...
- Ozone is unstable with respect to decomposition to ordi-nary oxygen: 2 O31g2 ∆ 3 O21g2 Kp = 1.3 * 1057 How man...