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Equilibrium: Reaction quotient

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Wize High School Grade 12 Chemistry Textbook > Equilibrium

The Reaction Quotient (Q)

8 Activities

Wize High School Grade 12 Chemistry Textbook > Equilibrium

The Equilibrium Constant (K)

5 Activities

If the reaction A⇌BA⇌B has an equilibrium constant of K = 10–4, which one of the following statements is always true?

More The Reaction Quotient (Q) Questions:
Equilibrium: Reaction Quotient
Silver chloride will react with acetic acid to form the complex ion silver acetate. A reaction mixture is prepared by adding 0.25 g of AgCl to a 1.25 L solution that already contains 4.6×10‐6M Ag(CH3COO)(aq), 2.3×10‐3M Cl-, 1.1×10‐8M H+, and 0.010M CH3COOH. Based on this information, which of the statements below is true?
AgCl(s)+CH3COOH(aq)⇌Ag(CH3COO)(aq)+Cl−(aq)+H+(aq)K=5.87×10−16AgCl(s)+CH_3 COOH(aq)⇌Ag(CH_3 COO)(aq)+Cl^- (aq)+H^+ (aq)\qquad K = 5.87×10^{-16}
After allowing this solution to rest for some time:
Equilibrium: Reaction Quotient
Silver chloride will react with acetic acid to form the complex ion silver acetate. A reaction mixture is prepared by adding 0.25 g of AgCl to a 1.25 L solution that already contains 4.6×10‐6M Ag(CH3COO)(aq), 2.3×10‐3M Cl-, 1.1×10‐8M H+, and 0.010M CH3COOH. Based on this information, which of the statements below is true?
AgCl(s)+CH3COOH(aq)⇌Ag(CH3COO)(aq)+Cl−(aq)+H+(aq)K=5.87×10−16AgCl(s)+CH_3 COOH(aq)⇌Ag(CH_3 COO)(aq)+Cl^- (aq)+H^+ (aq)\qquad K = 5.87×10^{-16}
After allowing this solution to rest for some time:
Equilibrium: Reaction quotient
H2(g)+CO2(g)↔H2O(g)+CO(g) at 2000K KP=4.40H_{2(g)}+CO_{2(g)}\leftrightarrow H_2O_{(g)}+CO_{(g)}\ at\ 2000K\ K_P=4.40
Will this reaction spontaneously shift towards products or reactants?
Equilibrium: Reaction quotient
The reaction of
H2(g)+CO2(g)↔H2O(g)+CO(g) at 2000K KP=4.40H_{2(g)}+CO_{2(g)}\leftrightarrow H_2O_{(g)}+CO_{(g)}\ at\ 2000K\ K_P=4.40
When PH2 = 0.35atm; PCO2 =0.85atm; PH2O = 0.71 atm and PCO = 1.35 atm calculate Q.
Equilibrium constant: Reaction quotient
Consider the reaction:
A+2B⇌C+DA + 2B ⇌ C + D
At a particular temperature this reaction is reactant-favoured at equilibrium. If for the current concentrations the forward reaction is favoured, which of the following statements is true?
Practice: Q and K
The system: H2(g) + X2(g) : 2 HX(g) has a value of 24.4 for Kc. A system being studied in a 3.00 liter reactor was charged with 0.150 moles of H2, 0.150 moles of X2, and 0.600 moles of HX. A catalyst was introduced using a remote unit. Which statement below describes the situation
Consider the following reaction to answer the next two questions:
4Cr(s)+3CCl4(g)⇄4CrCl3(g)+3C(s)        ΔH=26.9kJ4Cr(s)+3CCl_4(g) \rightleftarrows 4CrCl_3(g) +3C(s)\ \ \ \ \ \ \ \ \Delta H=26.9kJ
Equilibrium: Reaction Quotient
Which of the following statements regarding the reaction quotient Qc and the equilibrium constant Kc is true?
Equilibrium: Reaction Quotient
Silver chloride will react with acetic acid to form the complex ion silver acetate. A reaction mixture is prepared by adding 0.25 g of AgCl to a 1.25 L solution that already contains 4.6×10‐6M Ag(CH3COO)(aq), 2.3×10‐3M Cl-, 1.1×10‐8M H+, and 0.010M CH3COOH. Based on this information, which of the statements below is true?
AgCl(s)+CH3COOH(aq)⇌Ag(CH3COO)(aq)+Cl−(aq)+H+(aq)K=5.87×10−16AgCl(s)+CH_3 COOH(aq)⇌Ag(CH_3 COO)(aq)+Cl^- (aq)+H^+ (aq)\qquad K = 5.87×10^{-16}
After allowing this solution to rest for some time:
More The Equilibrium Constant (K) Questions:
Equilibrium constant
For the following equilibria determine whether K>1K > 1, K<1K < 1 or K≈1K \approx 1. Enter your answers as "Greater", "Less", "1" respectively.
A)
B)
Equilibrium and Le Chatelier's Principle
At time = t0, 0.40 mol of Br2 (ℓ) and 0.40 mol of Cℓ2 (g) are placed in an empty, rigid 10.00 L flask and allowed to reach equilibrium.
After reaching equilibrium at time = t2, the flask is found to contain 0.20 mol of BrCℓ (g). The temperature is held constant throughout the reaction.
Equilibrium Constant
Balance each reaction and write its equilibrium constant expression
NO(g)+O2(g)↔N2O3(g)NO_{(g)}+O_{2(g)} \leftrightarrow N_2O_{3(g)}
SF6(g)+SO3(g)↔SO2F2(g)SF_{6(g)}+SO_{3(g)}\leftrightarrow SO_2F_{2(g)}
Le Chatelier's Principle: Equilibrium constant
Consider the following reaction:
PCℓ5(g)⇌PCℓ3(g)+Cℓ2(g)PCℓ_5 (g) ⇌ PCℓ_3 (g) + Cℓ_2 (g)
The measured equilibrium constant is 5.0x10–4 at 373 K and 0.20 at 473 K. Which of the following statements about the reaction must be true?
Equilibrium: Constant
At 25 ˚C, KP = 5.2 × 10–2 for the following decomposition reaction:
NH4HS(s)⇌NH3(g)+H2S(g)NH_4HS (s) ⇌ NH_3 (g) + H_2S (g)
(a) Calculate the equilibrium partial pressures of ammonia (NH3) and hydrogen sulfide (H2S) if a sample of solid NH4HS is placed in a closed vessel initially containing 11 atm of NH3 gas. Note that the vessel still contains some solid NH4HS at equilibrium. State and justify any assumptions you might make during your calculation.
Equilibrium plots: Equilibrium constant
You mix three unknown compounds in a container: a solid (A), and two gases (E and X). You do not know the chemical formula of any of the compounds, but you are able to track the progress of the reaction by measuring changes in the concentrations of both gases, as shown in the graph below.
Which of these reactions and equilibrium constants could be represented by the data shown in this graph?