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HNO3 + FeS = H2O + H2SO4 + NO + Fe(NO3)3

Input interpretation

HNO_3 (nitric acid) + FeS (ferrous sulfide) ⟶ H_2O (water) + H_2SO_4 (sulfuric acid) + NO (nitric oxide) + Fe(NO_3)_3 (ferric nitrate)
HNO_3 (nitric acid) + FeS (ferrous sulfide) ⟶ H_2O (water) + H_2SO_4 (sulfuric acid) + NO (nitric oxide) + Fe(NO_3)_3 (ferric nitrate)

Balanced equation

Balance the chemical equation algebraically: HNO_3 + FeS ⟶ H_2O + H_2SO_4 + NO + Fe(NO_3)_3 Add stoichiometric coefficients, c_i, to the reactants and products: c_1 HNO_3 + c_2 FeS ⟶ c_3 H_2O + c_4 H_2SO_4 + c_5 NO + c_6 Fe(NO_3)_3 Set the number of atoms in the reactants equal to the number of atoms in the products for H, N, O, Fe and S: H: | c_1 = 2 c_3 + 2 c_4 N: | c_1 = c_5 + 3 c_6 O: | 3 c_1 = c_3 + 4 c_4 + c_5 + 9 c_6 Fe: | c_2 = c_6 S: | c_2 = c_4 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_2 = 1 and solve the system of equations for the remaining coefficients: c_1 = 6 c_2 = 1 c_3 = 2 c_4 = 1 c_5 = 3 c_6 = 1 Substitute the coefficients into the chemical reaction to obtain the balanced equation: Answer: | | 6 HNO_3 + FeS ⟶ 2 H_2O + H_2SO_4 + 3 NO + Fe(NO_3)_3
Balance the chemical equation algebraically: HNO_3 + FeS ⟶ H_2O + H_2SO_4 + NO + Fe(NO_3)_3 Add stoichiometric coefficients, c_i, to the reactants and products: c_1 HNO_3 + c_2 FeS ⟶ c_3 H_2O + c_4 H_2SO_4 + c_5 NO + c_6 Fe(NO_3)_3 Set the number of atoms in the reactants equal to the number of atoms in the products for H, N, O, Fe and S: H: | c_1 = 2 c_3 + 2 c_4 N: | c_1 = c_5 + 3 c_6 O: | 3 c_1 = c_3 + 4 c_4 + c_5 + 9 c_6 Fe: | c_2 = c_6 S: | c_2 = c_4 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_2 = 1 and solve the system of equations for the remaining coefficients: c_1 = 6 c_2 = 1 c_3 = 2 c_4 = 1 c_5 = 3 c_6 = 1 Substitute the coefficients into the chemical reaction to obtain the balanced equation: Answer: | | 6 HNO_3 + FeS ⟶ 2 H_2O + H_2SO_4 + 3 NO + Fe(NO_3)_3

Structures

+ ⟶ + + +
+ ⟶ + + +

Names

nitric acid + ferrous sulfide ⟶ water + sulfuric acid + nitric oxide + ferric nitrate
nitric acid + ferrous sulfide ⟶ water + sulfuric acid + nitric oxide + ferric nitrate

Equilibrium constant

Construct the equilibrium constant, K, expression for: HNO_3 + FeS ⟶ H_2O + H_2SO_4 + NO + Fe(NO_3)_3 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: 6 HNO_3 + FeS ⟶ 2 H_2O + H_2SO_4 + 3 NO + Fe(NO_3)_3 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 HNO_3 | 6 | -6 FeS | 1 | -1 H_2O | 2 | 2 H_2SO_4 | 1 | 1 NO | 3 | 3 Fe(NO_3)_3 | 1 | 1 Assemble the activity expressions accounting for the state of matter and ν_i: chemical species | c_i | ν_i | activity expression HNO_3 | 6 | -6 | ([HNO3])^(-6) FeS | 1 | -1 | ([FeS])^(-1) H_2O | 2 | 2 | ([H2O])^2 H_2SO_4 | 1 | 1 | [H2SO4] NO | 3 | 3 | ([NO])^3 Fe(NO_3)_3 | 1 | 1 | [Fe(NO3)3] 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 = ([HNO3])^(-6) ([FeS])^(-1) ([H2O])^2 [H2SO4] ([NO])^3 [Fe(NO3)3] = (([H2O])^2 [H2SO4] ([NO])^3 [Fe(NO3)3])/(([HNO3])^6 [FeS])
Construct the equilibrium constant, K, expression for: HNO_3 + FeS ⟶ H_2O + H_2SO_4 + NO + Fe(NO_3)_3 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: 6 HNO_3 + FeS ⟶ 2 H_2O + H_2SO_4 + 3 NO + Fe(NO_3)_3 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 HNO_3 | 6 | -6 FeS | 1 | -1 H_2O | 2 | 2 H_2SO_4 | 1 | 1 NO | 3 | 3 Fe(NO_3)_3 | 1 | 1 Assemble the activity expressions accounting for the state of matter and ν_i: chemical species | c_i | ν_i | activity expression HNO_3 | 6 | -6 | ([HNO3])^(-6) FeS | 1 | -1 | ([FeS])^(-1) H_2O | 2 | 2 | ([H2O])^2 H_2SO_4 | 1 | 1 | [H2SO4] NO | 3 | 3 | ([NO])^3 Fe(NO_3)_3 | 1 | 1 | [Fe(NO3)3] 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 = ([HNO3])^(-6) ([FeS])^(-1) ([H2O])^2 [H2SO4] ([NO])^3 [Fe(NO3)3] = (([H2O])^2 [H2SO4] ([NO])^3 [Fe(NO3)3])/(([HNO3])^6 [FeS])

Rate of reaction

Construct the rate of reaction expression for: HNO_3 + FeS ⟶ H_2O + H_2SO_4 + NO + Fe(NO_3)_3 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: 6 HNO_3 + FeS ⟶ 2 H_2O + H_2SO_4 + 3 NO + Fe(NO_3)_3 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 HNO_3 | 6 | -6 FeS | 1 | -1 H_2O | 2 | 2 H_2SO_4 | 1 | 1 NO | 3 | 3 Fe(NO_3)_3 | 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 HNO_3 | 6 | -6 | -1/6 (Δ[HNO3])/(Δt) FeS | 1 | -1 | -(Δ[FeS])/(Δt) H_2O | 2 | 2 | 1/2 (Δ[H2O])/(Δt) H_2SO_4 | 1 | 1 | (Δ[H2SO4])/(Δt) NO | 3 | 3 | 1/3 (Δ[NO])/(Δt) Fe(NO_3)_3 | 1 | 1 | (Δ[Fe(NO3)3])/(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 = -1/6 (Δ[HNO3])/(Δt) = -(Δ[FeS])/(Δt) = 1/2 (Δ[H2O])/(Δt) = (Δ[H2SO4])/(Δt) = 1/3 (Δ[NO])/(Δt) = (Δ[Fe(NO3)3])/(Δt) (assuming constant volume and no accumulation of intermediates or side products)
Construct the rate of reaction expression for: HNO_3 + FeS ⟶ H_2O + H_2SO_4 + NO + Fe(NO_3)_3 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: 6 HNO_3 + FeS ⟶ 2 H_2O + H_2SO_4 + 3 NO + Fe(NO_3)_3 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 HNO_3 | 6 | -6 FeS | 1 | -1 H_2O | 2 | 2 H_2SO_4 | 1 | 1 NO | 3 | 3 Fe(NO_3)_3 | 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 HNO_3 | 6 | -6 | -1/6 (Δ[HNO3])/(Δt) FeS | 1 | -1 | -(Δ[FeS])/(Δt) H_2O | 2 | 2 | 1/2 (Δ[H2O])/(Δt) H_2SO_4 | 1 | 1 | (Δ[H2SO4])/(Δt) NO | 3 | 3 | 1/3 (Δ[NO])/(Δt) Fe(NO_3)_3 | 1 | 1 | (Δ[Fe(NO3)3])/(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 = -1/6 (Δ[HNO3])/(Δt) = -(Δ[FeS])/(Δt) = 1/2 (Δ[H2O])/(Δt) = (Δ[H2SO4])/(Δt) = 1/3 (Δ[NO])/(Δt) = (Δ[Fe(NO3)3])/(Δt) (assuming constant volume and no accumulation of intermediates or side products)

Chemical names and formulas

| nitric acid | ferrous sulfide | water | sulfuric acid | nitric oxide | ferric nitrate formula | HNO_3 | FeS | H_2O | H_2SO_4 | NO | Fe(NO_3)_3 Hill formula | HNO_3 | FeS | H_2O | H_2O_4S | NO | FeN_3O_9 name | nitric acid | ferrous sulfide | water | sulfuric acid | nitric oxide | ferric nitrate IUPAC name | nitric acid | | water | sulfuric acid | nitric oxide | iron(+3) cation trinitrate
| nitric acid | ferrous sulfide | water | sulfuric acid | nitric oxide | ferric nitrate formula | HNO_3 | FeS | H_2O | H_2SO_4 | NO | Fe(NO_3)_3 Hill formula | HNO_3 | FeS | H_2O | H_2O_4S | NO | FeN_3O_9 name | nitric acid | ferrous sulfide | water | sulfuric acid | nitric oxide | ferric nitrate IUPAC name | nitric acid | | water | sulfuric acid | nitric oxide | iron(+3) cation trinitrate

Substance properties

| nitric acid | ferrous sulfide | water | sulfuric acid | nitric oxide | ferric nitrate molar mass | 63.012 g/mol | 87.9 g/mol | 18.015 g/mol | 98.07 g/mol | 30.006 g/mol | 241.86 g/mol phase | liquid (at STP) | solid (at STP) | liquid (at STP) | liquid (at STP) | gas (at STP) | solid (at STP) melting point | -41.6 °C | 1195 °C | 0 °C | 10.371 °C | -163.6 °C | 35 °C boiling point | 83 °C | | 99.9839 °C | 279.6 °C | -151.7 °C | density | 1.5129 g/cm^3 | 4.84 g/cm^3 | 1 g/cm^3 | 1.8305 g/cm^3 | 0.001226 g/cm^3 (at 25 °C) | 1.7 g/cm^3 solubility in water | miscible | insoluble | | very soluble | | very soluble surface tension | | | 0.0728 N/m | 0.0735 N/m | | dynamic viscosity | 7.6×10^-4 Pa s (at 25 °C) | 0.00343 Pa s (at 1250 °C) | 8.9×10^-4 Pa s (at 25 °C) | 0.021 Pa s (at 25 °C) | 1.911×10^-5 Pa s (at 25 °C) | odor | | | odorless | odorless | |
| nitric acid | ferrous sulfide | water | sulfuric acid | nitric oxide | ferric nitrate molar mass | 63.012 g/mol | 87.9 g/mol | 18.015 g/mol | 98.07 g/mol | 30.006 g/mol | 241.86 g/mol phase | liquid (at STP) | solid (at STP) | liquid (at STP) | liquid (at STP) | gas (at STP) | solid (at STP) melting point | -41.6 °C | 1195 °C | 0 °C | 10.371 °C | -163.6 °C | 35 °C boiling point | 83 °C | | 99.9839 °C | 279.6 °C | -151.7 °C | density | 1.5129 g/cm^3 | 4.84 g/cm^3 | 1 g/cm^3 | 1.8305 g/cm^3 | 0.001226 g/cm^3 (at 25 °C) | 1.7 g/cm^3 solubility in water | miscible | insoluble | | very soluble | | very soluble surface tension | | | 0.0728 N/m | 0.0735 N/m | | dynamic viscosity | 7.6×10^-4 Pa s (at 25 °C) | 0.00343 Pa s (at 1250 °C) | 8.9×10^-4 Pa s (at 25 °C) | 0.021 Pa s (at 25 °C) | 1.911×10^-5 Pa s (at 25 °C) | odor | | | odorless | odorless | |

Units

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