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This quiz contains 8 questions from a mix of 1 subtopics.
Select the correct Kc expression for the following reaction:
C2H5OH(aq) + CH3COOH(aq) ⇌ CH3COOC2H5(aq) + H2O(aq)
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What does the equilibrium constant, Kc, tell us?
the concentration of reactants
the concentration of products
the rate of reaction
the relative proportions of reactants and products
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A Kc value greater than indicates a position of equilbrium that is towards the products.
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What is the relationship between the value of Kc and the position of equilibrium?
the larger the value of Kc, the further the position of equilibrium lies to the left-hand side
the value of Kc has no relationship with the position of equilibrium
the larger the value of Kc, the further the position of equilibrium lies to the right-hand side
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Calculate the value of Kc, to 3 significant figures, for the following equilibrum:
H2(g) + I2(g) ⇌ 2HI(g)
The equilbrium concentrations are:
- [H2] = 4.00 x 10-4 mol dm-3
- [I2] = 6.00 x 10-4 mol dm-3
- [HI] = 1.14 x 10-3 mol dm-3
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Calculate the value of Kc, to 3 significant figures, for the following equilibrum:
N2(g) + 3H2(g) ⇌ 2NH3(g)
The equilbrium concentrations are:
- [N2] = 10.0 mol dm-3
- [H2] = 0.100 mol dm-3
- [NH3] = 0.750 mol dm-3
mol-2 dm6
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Select the correct units for Kc for the following reaction:
CH3COCH3 + HCN ⇌ CH3C(CN)(OH)CH3
mol-1 dm3
mol dm-3
mol-2 dm6
mol2 dm-6
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A(g) + B(g) ⇌ C(g)
Initially there was 0.20 mol of A and 0.40 mol of B in the mixture for the reaction above. A and B reacted together to produce an equilbirium mixture containing 0.080 mol of C. The total volume of the mixture of 2.0 dm3.
Calculate the value of Kc. Give your answer to 2 significant figures.
mol-1 dm3
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