Explanation Step 1: The equilibrium concentrations of H 2 and I 2 It is given that: The equilibrium constant of the given reaction is 55.3 . The volume of the vessel/reaction mixture is 2.00 L . The mass of H 2 gas at equilibrium is 0.056 g . The mass of I 2 gas at equilibrium is 4.36 g . Molar mass of H 2 is calculated as, 2 × ( 1.007 g/mol ) = 2.014 g/mol Number of moles of H 2 at equilibrium is calculated by the formula, Moles of H 2 = Mass of H 2 Molar mass of H 2 Substitute the value of the mass of H 2 and molar mass of H 2 in the above equation. Moles of H 2 = 0.056 g 2.014 g/mol = 0.028 mol The concentration (molarity) of H 2 at equilibrium is calculated by the formula, Molarity = Moles of H 2 Volume of reaction mixture Substitute the value of moles of H 2 and the volume of reaction mixture in the above equation. Molarity = 0.028 mol 2.00 L = 0.014 M Molar mass of I 2 is calculated as, 2 × ( 126.904 g/mol ) = 253.808 g/mol Number of moles of I 2 at equilibrium is calculated by the formula., Moles of I 2 = Mass of I 2 Molar mass of I 2 Substitute the value of the mass of I 2 and molar mass of I 2 in the above equation. Moles of I 2 = 4.36 g 253.808 g/mol = 0.017 mol The concentration (molarity) of I 2 at equilibrium is calculated by the formula, Molarity = Moles of I 2 Volume of reaction mixture Substitute the value of moles of I 2 and the volume of reaction mixture in the above equation. Molarity = 0.017 mol 2.00 L = 0.0085 M Step 2: The mass of HI at equilibrium in the reaction vessel: It is given that: The equilibrium constant of the given reaction is 55.3 . The volume of the vessel/reaction mixture is 2.00 L . The given reaction is, H 2 ( g ) + I 2 ( g ) ⇌ 2HI ( g ) The equilibrium concentration of HI is calculated by the formula, K c = [ HI ] 2 [ H 2 ] [ I 2 ] [ HI ] 2 = K c × [ H 2 ] × [ I 2 ] Where, K c is the equilibrium constant of the given reaction

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Chapter 15, Problem 48E

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The mass of HI at equilibrium in the reaction vessel.

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Chapter 15, Problem 47E

Chapter 15, Problem 49E

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Chapter 15 Solutions

CHEMISTRY: THE CENTRAL SCIENCE

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Chapter 15 Solutions

To determine:
The mass of HI at equilibrium in the reaction vessel.