Based on these descriptions, write a balanced equation and the corresponding
-
a. Carbonyl fluoride.
b. Copper metal displaces sliver(l) eon from aqueous solution, producing slyer metal and an aqueous solution of copper(ll) ion.
c. Peroxodisulfate ion,
(a)
Interpretation:
The balanced chemical equation and the Kc expression for the following reversible reaction should be determined:
Carbonyl fluoride, COF2(g), decomposes into gaseous carbon dioxide and carbon tetrafluoride.
Concept introduction:
The balanced reaction is that chemical reaction in which the number of atoms of each element in the product side and on reactant side are equal.
The relationship between the concentration of products and reactants at equilibrium for a general reaction:
Where A, B, C, and D represents chemical species and a, b, c, and d are the coefficients for balanced reaction.
The equilibrium expression, Kc for reversible reaction is determined by multiplying the concentrations of products together and divided by the concentrations of the reactants. Each concentration is raised to the power that is equal to the coefficient in the balanced reaction. So, the expression is:
Square brackets represent the concentration.
Answer to Problem 1E
The balanced chemical equation is:
The expression for the equilibrium constant is:
Explanation of Solution
The reversible reaction for the decomposition of carbonyl fluoride, COF2(g), into gaseous carbon dioxide, CO2(g) and carbon tetrafluoride, CF4(g) is:
This reaction is not balanced as:
The number of atoms of C on reactant side is 1 and on product side is 2, the number of atoms of F on reactant side is 2 and on product side is 4 and the number of atoms of O on reactant side is 1 and on product side is 2.
In order to balance the reaction, the coefficient 2 is put before COF2 on the reactant side.
Thus, the balanced chemical equation is:
In the balanced reversible equation, all the species that is reactant and product are in gaseous phase so, the expression for the equilibrium constant is:
(b)
Interpretation:
The balanced chemical equation and the Kc expression for the following reversible reaction should be determined:
Copper metal displaces silver(I) ion from aqueous solution, producing silver metal and an aqueous solution of copper(II) ion.
Concept introduction:
The balanced reaction is that chemical reaction in which the number of atoms of each element in the product side and on reactant side are equal.
The relationship between the concentration of products and reactants at equilibrium for a general reaction:
Where A, B, C, and D represents chemical species and a, b, c, and d are the coefficients for balanced reaction.
The equilibrium expression, Kc for reversible reaction is determined by multiplying the concentrations of products together and divided by the concentrations of the reactants. Each concentration is raised to the power that is equal to the coefficient in the balanced reaction. So, the expression is:
Square brackets represent the concentration.
Answer to Problem 1E
The balanced chemical equation is:
The expression for the equilibrium constant is:
Explanation of Solution
The reversible reaction for the displacement of silver(I) ion, Ag+(aq), in aqueous solution by copper metal, Cu(s) to produce silver metal, Ag (s) and an aqueous solution of copper (II) ion, Cu2+ is:
This reaction is not balanced as:
The charges on both the sides of the reaction is not balanced so in order to balance the reaction, the coefficient 2 is put before Ag+, the reaction becomes:
In order to balance the Ag atoms, the coefficient 2 is put before Ag on the product side.
Thus, the balanced chemical equation is:
In the balanced reaction, the concentrations of pure solids are constant that is they do not change. Thus, they are not included in the equilibrium expression.
(c)
Interpretation:
The balanced chemical equation and the Kc expression for the following reversible reaction should be determined:
Peroxodisulfate ion, S2O82-, oxidizes iron (II) to iron (III) ion in aqueous solution and is itself reduced to sulfate ion.
Concept introduction:
The balanced reaction is that chemical reaction in which the number of atoms of each element in the product side and on reactant side are equal.
The relationship between the concentration of products and reactants at equilibrium for a general reaction:
Where A, B, C, and D represents chemical species and a, b, c, and d are the coefficients for balanced reaction.
The equilibrium expression, Kc for reversible reaction is determined by multiplying the concentrations of products together and divided by the concentrations of the reactants. Each concentration is raised to the power that is equal to the coefficient in the balanced reaction. So, the expression is:
Square brackets represent the concentration.
Answer to Problem 1E
The balanced chemical equation is:
The expression for the equilibrium constant is:
Explanation of Solution
The oxidation of iron (II) ion, Fe2+ to iron (III) ion, Fe3+ by peroxodisulfate ion, S2O82- and gets reduced itself to sulfate ion, SO42- in aqueous solution is:
This reaction is not balanced as:
The number of atoms of S on reactant side is 2 and on product side is 1 and the number of atoms of O on reactant side is 8 and on product side is 4.
In order to balance the charge and atoms in the reaction, the coefficient 2 is put before Fe2+ on the reactant side and coefficient 2 is put before the SO42- and Fe3+ on the product side.
Thus, the balanced chemical equation is:
In the balanced reversible equation, all the species that is reactant and product are in gaseous phase so, the expression for the equilibrium constant is:
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