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Na3PO4 + AlI3 = NaI + AlPO4

Input interpretation

Na_3PO_4 trisodium phosphate + AlI_3 aluminum iodide ⟶ NaI sodium iodide + AlPO_4 aluminum phosphate
Na_3PO_4 trisodium phosphate + AlI_3 aluminum iodide ⟶ NaI sodium iodide + AlPO_4 aluminum phosphate

Balanced equation

Balance the chemical equation algebraically: Na_3PO_4 + AlI_3 ⟶ NaI + AlPO_4 Add stoichiometric coefficients, c_i, to the reactants and products: c_1 Na_3PO_4 + c_2 AlI_3 ⟶ c_3 NaI + c_4 AlPO_4 Set the number of atoms in the reactants equal to the number of atoms in the products for Na, O, P, Al and I: Na: | 3 c_1 = c_3 O: | 4 c_1 = 4 c_4 P: | c_1 = c_4 Al: | c_2 = c_4 I: | 3 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 = 3 c_4 = 1 Substitute the coefficients into the chemical reaction to obtain the balanced equation: Answer: | | Na_3PO_4 + AlI_3 ⟶ 3 NaI + AlPO_4
Balance the chemical equation algebraically: Na_3PO_4 + AlI_3 ⟶ NaI + AlPO_4 Add stoichiometric coefficients, c_i, to the reactants and products: c_1 Na_3PO_4 + c_2 AlI_3 ⟶ c_3 NaI + c_4 AlPO_4 Set the number of atoms in the reactants equal to the number of atoms in the products for Na, O, P, Al and I: Na: | 3 c_1 = c_3 O: | 4 c_1 = 4 c_4 P: | c_1 = c_4 Al: | c_2 = c_4 I: | 3 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 = 3 c_4 = 1 Substitute the coefficients into the chemical reaction to obtain the balanced equation: Answer: | | Na_3PO_4 + AlI_3 ⟶ 3 NaI + AlPO_4

Structures

+ ⟶ +
+ ⟶ +

Names

trisodium phosphate + aluminum iodide ⟶ sodium iodide + aluminum phosphate
trisodium phosphate + aluminum iodide ⟶ sodium iodide + aluminum phosphate

Equilibrium constant

Construct the equilibrium constant, K, expression for: Na_3PO_4 + AlI_3 ⟶ NaI + AlPO_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: Na_3PO_4 + AlI_3 ⟶ 3 NaI + AlPO_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 Na_3PO_4 | 1 | -1 AlI_3 | 1 | -1 NaI | 3 | 3 AlPO_4 | 1 | 1 Assemble the activity expressions accounting for the state of matter and ν_i: chemical species | c_i | ν_i | activity expression Na_3PO_4 | 1 | -1 | ([Na3PO4])^(-1) AlI_3 | 1 | -1 | ([AlI3])^(-1) NaI | 3 | 3 | ([NaI])^3 AlPO_4 | 1 | 1 | [AlO4P] 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 = ([Na3PO4])^(-1) ([AlI3])^(-1) ([NaI])^3 [AlO4P] = (([NaI])^3 [AlO4P])/([Na3PO4] [AlI3])
Construct the equilibrium constant, K, expression for: Na_3PO_4 + AlI_3 ⟶ NaI + AlPO_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: Na_3PO_4 + AlI_3 ⟶ 3 NaI + AlPO_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 Na_3PO_4 | 1 | -1 AlI_3 | 1 | -1 NaI | 3 | 3 AlPO_4 | 1 | 1 Assemble the activity expressions accounting for the state of matter and ν_i: chemical species | c_i | ν_i | activity expression Na_3PO_4 | 1 | -1 | ([Na3PO4])^(-1) AlI_3 | 1 | -1 | ([AlI3])^(-1) NaI | 3 | 3 | ([NaI])^3 AlPO_4 | 1 | 1 | [AlO4P] 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 = ([Na3PO4])^(-1) ([AlI3])^(-1) ([NaI])^3 [AlO4P] = (([NaI])^3 [AlO4P])/([Na3PO4] [AlI3])

Rate of reaction

Construct the rate of reaction expression for: Na_3PO_4 + AlI_3 ⟶ NaI + AlPO_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: Na_3PO_4 + AlI_3 ⟶ 3 NaI + AlPO_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 Na_3PO_4 | 1 | -1 AlI_3 | 1 | -1 NaI | 3 | 3 AlPO_4 | 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 Na_3PO_4 | 1 | -1 | -(Δ[Na3PO4])/(Δt) AlI_3 | 1 | -1 | -(Δ[AlI3])/(Δt) NaI | 3 | 3 | 1/3 (Δ[NaI])/(Δt) AlPO_4 | 1 | 1 | (Δ[AlO4P])/(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[Na3PO4])/(Δt) = -(Δ[AlI3])/(Δt) = 1/3 (Δ[NaI])/(Δt) = (Δ[AlO4P])/(Δt) (assuming constant volume and no accumulation of intermediates or side products)
Construct the rate of reaction expression for: Na_3PO_4 + AlI_3 ⟶ NaI + AlPO_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: Na_3PO_4 + AlI_3 ⟶ 3 NaI + AlPO_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 Na_3PO_4 | 1 | -1 AlI_3 | 1 | -1 NaI | 3 | 3 AlPO_4 | 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 Na_3PO_4 | 1 | -1 | -(Δ[Na3PO4])/(Δt) AlI_3 | 1 | -1 | -(Δ[AlI3])/(Δt) NaI | 3 | 3 | 1/3 (Δ[NaI])/(Δt) AlPO_4 | 1 | 1 | (Δ[AlO4P])/(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[Na3PO4])/(Δt) = -(Δ[AlI3])/(Δt) = 1/3 (Δ[NaI])/(Δt) = (Δ[AlO4P])/(Δt) (assuming constant volume and no accumulation of intermediates or side products)

Chemical names and formulas

| trisodium phosphate | aluminum iodide | sodium iodide | aluminum phosphate formula | Na_3PO_4 | AlI_3 | NaI | AlPO_4 Hill formula | Na_3O_4P | AlI_3 | INa | AlPO_4 name | trisodium phosphate | aluminum iodide | sodium iodide | aluminum phosphate IUPAC name | trisodium phosphate | triiodoalumane | sodium iodide | aluminum phosphate
| trisodium phosphate | aluminum iodide | sodium iodide | aluminum phosphate formula | Na_3PO_4 | AlI_3 | NaI | AlPO_4 Hill formula | Na_3O_4P | AlI_3 | INa | AlPO_4 name | trisodium phosphate | aluminum iodide | sodium iodide | aluminum phosphate IUPAC name | trisodium phosphate | triiodoalumane | sodium iodide | aluminum phosphate

Substance properties

| trisodium phosphate | aluminum iodide | sodium iodide | aluminum phosphate molar mass | 163.94 g/mol | 407.69495 g/mol | 149.89424 g/mol | 121.95 g/mol phase | solid (at STP) | solid (at STP) | solid (at STP) | solid (at STP) melting point | 75 °C | 191 °C | 661 °C | 1800 °C boiling point | | 360 °C | 1300 °C | density | 2.536 g/cm^3 | 3.98 g/cm^3 | 3.67 g/cm^3 | 2.56 g/cm^3 solubility in water | soluble | decomposes | | insoluble dynamic viscosity | | | 0.0010446 Pa s (at 691 °C) | odor | odorless | | |
| trisodium phosphate | aluminum iodide | sodium iodide | aluminum phosphate molar mass | 163.94 g/mol | 407.69495 g/mol | 149.89424 g/mol | 121.95 g/mol phase | solid (at STP) | solid (at STP) | solid (at STP) | solid (at STP) melting point | 75 °C | 191 °C | 661 °C | 1800 °C boiling point | | 360 °C | 1300 °C | density | 2.536 g/cm^3 | 3.98 g/cm^3 | 3.67 g/cm^3 | 2.56 g/cm^3 solubility in water | soluble | decomposes | | insoluble dynamic viscosity | | | 0.0010446 Pa s (at 691 °C) | odor | odorless | | |

Units

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