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HNO3 + Fe3P2 = H2O + NO + Fe(NO3)3 + FePO4

Input interpretation

HNO_3 nitric acid + Fe3P2 ⟶ H_2O water + NO nitric oxide + Fe(NO_3)_3 ferric nitrate + FePO_4 iron(III) phosphate
HNO_3 nitric acid + Fe3P2 ⟶ H_2O water + NO nitric oxide + Fe(NO_3)_3 ferric nitrate + FePO_4 iron(III) phosphate

Balanced equation

Balance the chemical equation algebraically: HNO_3 + Fe3P2 ⟶ H_2O + NO + Fe(NO_3)_3 + FePO_4 Add stoichiometric coefficients, c_i, to the reactants and products: c_1 HNO_3 + c_2 Fe3P2 ⟶ c_3 H_2O + c_4 NO + c_5 Fe(NO_3)_3 + c_6 FePO_4 Set the number of atoms in the reactants equal to the number of atoms in the products for H, N, O, Fe and P: H: | c_1 = 2 c_3 N: | c_1 = c_4 + 3 c_5 O: | 3 c_1 = c_3 + c_4 + 9 c_5 + 4 c_6 Fe: | 3 c_2 = c_5 + c_6 P: | 2 c_2 = c_6 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 = 28/3 c_2 = 1 c_3 = 14/3 c_4 = 19/3 c_5 = 1 c_6 = 2 Multiply by the least common denominator, 3, to eliminate fractional coefficients: c_1 = 28 c_2 = 3 c_3 = 14 c_4 = 19 c_5 = 3 c_6 = 6 Substitute the coefficients into the chemical reaction to obtain the balanced equation: Answer: |   | 28 HNO_3 + 3 Fe3P2 ⟶ 14 H_2O + 19 NO + 3 Fe(NO_3)_3 + 6 FePO_4
Balance the chemical equation algebraically: HNO_3 + Fe3P2 ⟶ H_2O + NO + Fe(NO_3)_3 + FePO_4 Add stoichiometric coefficients, c_i, to the reactants and products: c_1 HNO_3 + c_2 Fe3P2 ⟶ c_3 H_2O + c_4 NO + c_5 Fe(NO_3)_3 + c_6 FePO_4 Set the number of atoms in the reactants equal to the number of atoms in the products for H, N, O, Fe and P: H: | c_1 = 2 c_3 N: | c_1 = c_4 + 3 c_5 O: | 3 c_1 = c_3 + c_4 + 9 c_5 + 4 c_6 Fe: | 3 c_2 = c_5 + c_6 P: | 2 c_2 = c_6 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 = 28/3 c_2 = 1 c_3 = 14/3 c_4 = 19/3 c_5 = 1 c_6 = 2 Multiply by the least common denominator, 3, to eliminate fractional coefficients: c_1 = 28 c_2 = 3 c_3 = 14 c_4 = 19 c_5 = 3 c_6 = 6 Substitute the coefficients into the chemical reaction to obtain the balanced equation: Answer: | | 28 HNO_3 + 3 Fe3P2 ⟶ 14 H_2O + 19 NO + 3 Fe(NO_3)_3 + 6 FePO_4

Structures

 + Fe3P2 ⟶ + + +
+ Fe3P2 ⟶ + + +

Names

nitric acid + Fe3P2 ⟶ water + nitric oxide + ferric nitrate + iron(III) phosphate
nitric acid + Fe3P2 ⟶ water + nitric oxide + ferric nitrate + iron(III) phosphate

Equilibrium constant

Construct the equilibrium constant, K, expression for: HNO_3 + Fe3P2 ⟶ H_2O + NO + Fe(NO_3)_3 + FePO_4 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: 28 HNO_3 + 3 Fe3P2 ⟶ 14 H_2O + 19 NO + 3 Fe(NO_3)_3 + 6 FePO_4 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 | 28 | -28 Fe3P2 | 3 | -3 H_2O | 14 | 14 NO | 19 | 19 Fe(NO_3)_3 | 3 | 3 FePO_4 | 6 | 6 Assemble the activity expressions accounting for the state of matter and ν_i: chemical species | c_i | ν_i | activity expression HNO_3 | 28 | -28 | ([HNO3])^(-28) Fe3P2 | 3 | -3 | ([Fe3P2])^(-3) H_2O | 14 | 14 | ([H2O])^14 NO | 19 | 19 | ([NO])^19 Fe(NO_3)_3 | 3 | 3 | ([Fe(NO3)3])^3 FePO_4 | 6 | 6 | ([FePO4])^6 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])^(-28) ([Fe3P2])^(-3) ([H2O])^14 ([NO])^19 ([Fe(NO3)3])^3 ([FePO4])^6 = (([H2O])^14 ([NO])^19 ([Fe(NO3)3])^3 ([FePO4])^6)/(([HNO3])^28 ([Fe3P2])^3)
Construct the equilibrium constant, K, expression for: HNO_3 + Fe3P2 ⟶ H_2O + NO + Fe(NO_3)_3 + FePO_4 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: 28 HNO_3 + 3 Fe3P2 ⟶ 14 H_2O + 19 NO + 3 Fe(NO_3)_3 + 6 FePO_4 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 | 28 | -28 Fe3P2 | 3 | -3 H_2O | 14 | 14 NO | 19 | 19 Fe(NO_3)_3 | 3 | 3 FePO_4 | 6 | 6 Assemble the activity expressions accounting for the state of matter and ν_i: chemical species | c_i | ν_i | activity expression HNO_3 | 28 | -28 | ([HNO3])^(-28) Fe3P2 | 3 | -3 | ([Fe3P2])^(-3) H_2O | 14 | 14 | ([H2O])^14 NO | 19 | 19 | ([NO])^19 Fe(NO_3)_3 | 3 | 3 | ([Fe(NO3)3])^3 FePO_4 | 6 | 6 | ([FePO4])^6 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])^(-28) ([Fe3P2])^(-3) ([H2O])^14 ([NO])^19 ([Fe(NO3)3])^3 ([FePO4])^6 = (([H2O])^14 ([NO])^19 ([Fe(NO3)3])^3 ([FePO4])^6)/(([HNO3])^28 ([Fe3P2])^3)

Rate of reaction

Construct the rate of reaction expression for: HNO_3 + Fe3P2 ⟶ H_2O + NO + Fe(NO_3)_3 + FePO_4 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: 28 HNO_3 + 3 Fe3P2 ⟶ 14 H_2O + 19 NO + 3 Fe(NO_3)_3 + 6 FePO_4 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 | 28 | -28 Fe3P2 | 3 | -3 H_2O | 14 | 14 NO | 19 | 19 Fe(NO_3)_3 | 3 | 3 FePO_4 | 6 | 6 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 | 28 | -28 | -1/28 (Δ[HNO3])/(Δt) Fe3P2 | 3 | -3 | -1/3 (Δ[Fe3P2])/(Δt) H_2O | 14 | 14 | 1/14 (Δ[H2O])/(Δt) NO | 19 | 19 | 1/19 (Δ[NO])/(Δt) Fe(NO_3)_3 | 3 | 3 | 1/3 (Δ[Fe(NO3)3])/(Δt) FePO_4 | 6 | 6 | 1/6 (Δ[FePO4])/(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 = -1/28 (Δ[HNO3])/(Δt) = -1/3 (Δ[Fe3P2])/(Δt) = 1/14 (Δ[H2O])/(Δt) = 1/19 (Δ[NO])/(Δt) = 1/3 (Δ[Fe(NO3)3])/(Δt) = 1/6 (Δ[FePO4])/(Δt) (assuming constant volume and no accumulation of intermediates or side products)
Construct the rate of reaction expression for: HNO_3 + Fe3P2 ⟶ H_2O + NO + Fe(NO_3)_3 + FePO_4 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: 28 HNO_3 + 3 Fe3P2 ⟶ 14 H_2O + 19 NO + 3 Fe(NO_3)_3 + 6 FePO_4 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 | 28 | -28 Fe3P2 | 3 | -3 H_2O | 14 | 14 NO | 19 | 19 Fe(NO_3)_3 | 3 | 3 FePO_4 | 6 | 6 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 | 28 | -28 | -1/28 (Δ[HNO3])/(Δt) Fe3P2 | 3 | -3 | -1/3 (Δ[Fe3P2])/(Δt) H_2O | 14 | 14 | 1/14 (Δ[H2O])/(Δt) NO | 19 | 19 | 1/19 (Δ[NO])/(Δt) Fe(NO_3)_3 | 3 | 3 | 1/3 (Δ[Fe(NO3)3])/(Δt) FePO_4 | 6 | 6 | 1/6 (Δ[FePO4])/(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 = -1/28 (Δ[HNO3])/(Δt) = -1/3 (Δ[Fe3P2])/(Δt) = 1/14 (Δ[H2O])/(Δt) = 1/19 (Δ[NO])/(Δt) = 1/3 (Δ[Fe(NO3)3])/(Δt) = 1/6 (Δ[FePO4])/(Δt) (assuming constant volume and no accumulation of intermediates or side products)

Chemical names and formulas

 | nitric acid | Fe3P2 | water | nitric oxide | ferric nitrate | iron(III) phosphate formula | HNO_3 | Fe3P2 | H_2O | NO | Fe(NO_3)_3 | FePO_4 Hill formula | HNO_3 | Fe3P2 | H_2O | NO | FeN_3O_9 | FeO_4P name | nitric acid | | water | nitric oxide | ferric nitrate | iron(III) phosphate IUPAC name | nitric acid | | water | nitric oxide | iron(+3) cation trinitrate | iron(+3) cation phosphate
| nitric acid | Fe3P2 | water | nitric oxide | ferric nitrate | iron(III) phosphate formula | HNO_3 | Fe3P2 | H_2O | NO | Fe(NO_3)_3 | FePO_4 Hill formula | HNO_3 | Fe3P2 | H_2O | NO | FeN_3O_9 | FeO_4P name | nitric acid | | water | nitric oxide | ferric nitrate | iron(III) phosphate IUPAC name | nitric acid | | water | nitric oxide | iron(+3) cation trinitrate | iron(+3) cation phosphate