O2 + Ag = AgO2

O_2 oxygen + Ag silver ⟶ AgO2

Balance the chemical equation algebraically: O_2 + Ag ⟶ AgO2 Add stoichiometric coefficients, c_i, to the reactants and products: c_1 O_2 + c_2 Ag ⟶ c_3 AgO2 Set the number of atoms in the reactants equal to the number of atoms in the products for O and Ag: O: | 2 c_1 = 2 c_3 Ag: | c_2 = c_3 Since the coefficients are relative quantities and underdetermined, choose a coefficient to set arbitrarily. To keep the coefficients small, the arbitrary value is ordinarily one. For instance, set c_1 = 1 and solve the system of equations for the remaining coefficients: c_1 = 1 c_2 = 1 c_3 = 1 Substitute the coefficients into the chemical reaction to obtain the balanced equation: Answer: | | O_2 + Ag ⟶ AgO2

+ ⟶ AgO2

oxygen + silver ⟶ AgO2

Construct the equilibrium constant, K, expression for: O_2 + Ag ⟶ AgO2 Plan: • Balance the chemical equation. • Determine the stoichiometric numbers. • Assemble the activity expression for each chemical species. • Use the activity expressions to build the equilibrium constant expression. Write the balanced chemical equation: O_2 + Ag ⟶ AgO2 Assign stoichiometric numbers, ν_i, using the stoichiometric coefficients, c_i, from the balanced chemical equation in the following manner: ν_i = -c_i for reactants and ν_i = c_i for products: chemical species | c_i | ν_i O_2 | 1 | -1 Ag | 1 | -1 AgO2 | 1 | 1 Assemble the activity expressions accounting for the state of matter and ν_i: chemical species | c_i | ν_i | activity expression O_2 | 1 | -1 | ([O2])^(-1) Ag | 1 | -1 | ([Ag])^(-1) AgO2 | 1 | 1 | [AgO2] The equilibrium constant symbol in the concentration basis is: K_c Mulitply the activity expressions to arrive at the K_c expression: Answer: | | K_c = ([O2])^(-1) ([Ag])^(-1) [AgO2] = ([AgO2])/([O2] [Ag])

Construct the rate of reaction expression for: O_2 + Ag ⟶ AgO2 Plan: • Balance the chemical equation. • Determine the stoichiometric numbers. • Assemble the rate term for each chemical species. • Write the rate of reaction expression. Write the balanced chemical equation: O_2 + Ag ⟶ AgO2 Assign stoichiometric numbers, ν_i, using the stoichiometric coefficients, c_i, from the balanced chemical equation in the following manner: ν_i = -c_i for reactants and ν_i = c_i for products: chemical species | c_i | ν_i O_2 | 1 | -1 Ag | 1 | -1 AgO2 | 1 | 1 The rate term for each chemical species, B_i, is 1/ν_i(Δ[B_i])/(Δt) where [B_i] is the amount concentration and t is time: chemical species | c_i | ν_i | rate term O_2 | 1 | -1 | -(Δ[O2])/(Δt) Ag | 1 | -1 | -(Δ[Ag])/(Δt) AgO2 | 1 | 1 | (Δ[AgO2])/(Δt) (for infinitesimal rate of change, replace Δ with d) Set the rate terms equal to each other to arrive at the rate expression: Answer: | | rate = -(Δ[O2])/(Δt) = -(Δ[Ag])/(Δt) = (Δ[AgO2])/(Δt) (assuming constant volume and no accumulation of intermediates or side products)

| oxygen | silver | AgO2 formula | O_2 | Ag | AgO2 name | oxygen | silver | IUPAC name | molecular oxygen | silver |

| oxygen | silver | AgO2 molar mass | 31.998 g/mol | 107.8682 g/mol | 139.866 g/mol phase | gas (at STP) | solid (at STP) | melting point | -218 °C | 960 °C | boiling point | -183 °C | 2212 °C | density | 0.001429 g/cm^3 (at 0 °C) | 10.49 g/cm^3 | solubility in water | | insoluble | surface tension | 0.01347 N/m | | dynamic viscosity | 2.055×10^-5 Pa s (at 25 °C) | | odor | odorless | |