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MgCl2 + Na3PO4 = NaCl + Mg3(PO4)2

Input interpretation

MgCl_2 magnesium chloride + Na_3PO_4 trisodium phosphate ⟶ NaCl sodium chloride + Mg_3(PO_4)_2·5H_2O Trimagnesium diphosphate pentahydrate
MgCl_2 magnesium chloride + Na_3PO_4 trisodium phosphate ⟶ NaCl sodium chloride + Mg_3(PO_4)_2·5H_2O Trimagnesium diphosphate pentahydrate

Balanced equation

Balance the chemical equation algebraically: MgCl_2 + Na_3PO_4 ⟶ NaCl + Mg_3(PO_4)_2·5H_2O Add stoichiometric coefficients, c_i, to the reactants and products: c_1 MgCl_2 + c_2 Na_3PO_4 ⟶ c_3 NaCl + c_4 Mg_3(PO_4)_2·5H_2O Set the number of atoms in the reactants equal to the number of atoms in the products for Cl, Mg, Na, O and P: Cl: | 2 c_1 = c_3 Mg: | c_1 = 3 c_4 Na: | 3 c_2 = c_3 O: | 4 c_2 = 8 c_4 P: | c_2 = 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_4 = 1 and solve the system of equations for the remaining coefficients: c_1 = 3 c_2 = 2 c_3 = 6 c_4 = 1 Substitute the coefficients into the chemical reaction to obtain the balanced equation: Answer: | | 3 MgCl_2 + 2 Na_3PO_4 ⟶ 6 NaCl + Mg_3(PO_4)_2·5H_2O
Balance the chemical equation algebraically: MgCl_2 + Na_3PO_4 ⟶ NaCl + Mg_3(PO_4)_2·5H_2O Add stoichiometric coefficients, c_i, to the reactants and products: c_1 MgCl_2 + c_2 Na_3PO_4 ⟶ c_3 NaCl + c_4 Mg_3(PO_4)_2·5H_2O Set the number of atoms in the reactants equal to the number of atoms in the products for Cl, Mg, Na, O and P: Cl: | 2 c_1 = c_3 Mg: | c_1 = 3 c_4 Na: | 3 c_2 = c_3 O: | 4 c_2 = 8 c_4 P: | c_2 = 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_4 = 1 and solve the system of equations for the remaining coefficients: c_1 = 3 c_2 = 2 c_3 = 6 c_4 = 1 Substitute the coefficients into the chemical reaction to obtain the balanced equation: Answer: | | 3 MgCl_2 + 2 Na_3PO_4 ⟶ 6 NaCl + Mg_3(PO_4)_2·5H_2O

Structures

+ ⟶ +
+ ⟶ +

Names

magnesium chloride + trisodium phosphate ⟶ sodium chloride + Trimagnesium diphosphate pentahydrate
magnesium chloride + trisodium phosphate ⟶ sodium chloride + Trimagnesium diphosphate pentahydrate

Equilibrium constant

Construct the equilibrium constant, K, expression for: MgCl_2 + Na_3PO_4 ⟶ NaCl + Mg_3(PO_4)_2·5H_2O 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: 3 MgCl_2 + 2 Na_3PO_4 ⟶ 6 NaCl + Mg_3(PO_4)_2·5H_2O 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 MgCl_2 | 3 | -3 Na_3PO_4 | 2 | -2 NaCl | 6 | 6 Mg_3(PO_4)_2·5H_2O | 1 | 1 Assemble the activity expressions accounting for the state of matter and ν_i: chemical species | c_i | ν_i | activity expression MgCl_2 | 3 | -3 | ([MgCl2])^(-3) Na_3PO_4 | 2 | -2 | ([Na3PO4])^(-2) NaCl | 6 | 6 | ([NaCl])^6 Mg_3(PO_4)_2·5H_2O | 1 | 1 | [Mg3(PO4)2·5H2O] 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 = ([MgCl2])^(-3) ([Na3PO4])^(-2) ([NaCl])^6 [Mg3(PO4)2·5H2O] = (([NaCl])^6 [Mg3(PO4)2·5H2O])/(([MgCl2])^3 ([Na3PO4])^2)
Construct the equilibrium constant, K, expression for: MgCl_2 + Na_3PO_4 ⟶ NaCl + Mg_3(PO_4)_2·5H_2O 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: 3 MgCl_2 + 2 Na_3PO_4 ⟶ 6 NaCl + Mg_3(PO_4)_2·5H_2O 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 MgCl_2 | 3 | -3 Na_3PO_4 | 2 | -2 NaCl | 6 | 6 Mg_3(PO_4)_2·5H_2O | 1 | 1 Assemble the activity expressions accounting for the state of matter and ν_i: chemical species | c_i | ν_i | activity expression MgCl_2 | 3 | -3 | ([MgCl2])^(-3) Na_3PO_4 | 2 | -2 | ([Na3PO4])^(-2) NaCl | 6 | 6 | ([NaCl])^6 Mg_3(PO_4)_2·5H_2O | 1 | 1 | [Mg3(PO4)2·5H2O] 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 = ([MgCl2])^(-3) ([Na3PO4])^(-2) ([NaCl])^6 [Mg3(PO4)2·5H2O] = (([NaCl])^6 [Mg3(PO4)2·5H2O])/(([MgCl2])^3 ([Na3PO4])^2)

Rate of reaction

Construct the rate of reaction expression for: MgCl_2 + Na_3PO_4 ⟶ NaCl + Mg_3(PO_4)_2·5H_2O 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: 3 MgCl_2 + 2 Na_3PO_4 ⟶ 6 NaCl + Mg_3(PO_4)_2·5H_2O 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 MgCl_2 | 3 | -3 Na_3PO_4 | 2 | -2 NaCl | 6 | 6 Mg_3(PO_4)_2·5H_2O | 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 MgCl_2 | 3 | -3 | -1/3 (Δ[MgCl2])/(Δt) Na_3PO_4 | 2 | -2 | -1/2 (Δ[Na3PO4])/(Δt) NaCl | 6 | 6 | 1/6 (Δ[NaCl])/(Δt) Mg_3(PO_4)_2·5H_2O | 1 | 1 | (Δ[Mg3(PO4)2·5H2O])/(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 = -1/3 (Δ[MgCl2])/(Δt) = -1/2 (Δ[Na3PO4])/(Δt) = 1/6 (Δ[NaCl])/(Δt) = (Δ[Mg3(PO4)2·5H2O])/(Δt) (assuming constant volume and no accumulation of intermediates or side products)
Construct the rate of reaction expression for: MgCl_2 + Na_3PO_4 ⟶ NaCl + Mg_3(PO_4)_2·5H_2O 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: 3 MgCl_2 + 2 Na_3PO_4 ⟶ 6 NaCl + Mg_3(PO_4)_2·5H_2O 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 MgCl_2 | 3 | -3 Na_3PO_4 | 2 | -2 NaCl | 6 | 6 Mg_3(PO_4)_2·5H_2O | 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 MgCl_2 | 3 | -3 | -1/3 (Δ[MgCl2])/(Δt) Na_3PO_4 | 2 | -2 | -1/2 (Δ[Na3PO4])/(Δt) NaCl | 6 | 6 | 1/6 (Δ[NaCl])/(Δt) Mg_3(PO_4)_2·5H_2O | 1 | 1 | (Δ[Mg3(PO4)2·5H2O])/(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 = -1/3 (Δ[MgCl2])/(Δt) = -1/2 (Δ[Na3PO4])/(Δt) = 1/6 (Δ[NaCl])/(Δt) = (Δ[Mg3(PO4)2·5H2O])/(Δt) (assuming constant volume and no accumulation of intermediates or side products)

Chemical names and formulas

| magnesium chloride | trisodium phosphate | sodium chloride | Trimagnesium diphosphate pentahydrate formula | MgCl_2 | Na_3PO_4 | NaCl | Mg_3(PO_4)_2·5H_2O Hill formula | Cl_2Mg | Na_3O_4P | ClNa | Mg_3O_8P_2 name | magnesium chloride | trisodium phosphate | sodium chloride | Trimagnesium diphosphate pentahydrate IUPAC name | magnesium dichloride | trisodium phosphate | sodium chloride | trimagnesium diphosphate
| magnesium chloride | trisodium phosphate | sodium chloride | Trimagnesium diphosphate pentahydrate formula | MgCl_2 | Na_3PO_4 | NaCl | Mg_3(PO_4)_2·5H_2O Hill formula | Cl_2Mg | Na_3O_4P | ClNa | Mg_3O_8P_2 name | magnesium chloride | trisodium phosphate | sodium chloride | Trimagnesium diphosphate pentahydrate IUPAC name | magnesium dichloride | trisodium phosphate | sodium chloride | trimagnesium diphosphate

Substance properties

| magnesium chloride | trisodium phosphate | sodium chloride | Trimagnesium diphosphate pentahydrate molar mass | 95.2 g/mol | 163.94 g/mol | 58.44 g/mol | 262.85 g/mol phase | solid (at STP) | solid (at STP) | solid (at STP) | solid (at STP) melting point | 714 °C | 75 °C | 801 °C | 1357 °C boiling point | | | 1413 °C | density | 2.32 g/cm^3 | 2.536 g/cm^3 | 2.16 g/cm^3 | solubility in water | soluble | soluble | soluble | insoluble odor | | odorless | odorless |
| magnesium chloride | trisodium phosphate | sodium chloride | Trimagnesium diphosphate pentahydrate molar mass | 95.2 g/mol | 163.94 g/mol | 58.44 g/mol | 262.85 g/mol phase | solid (at STP) | solid (at STP) | solid (at STP) | solid (at STP) melting point | 714 °C | 75 °C | 801 °C | 1357 °C boiling point | | | 1413 °C | density | 2.32 g/cm^3 | 2.536 g/cm^3 | 2.16 g/cm^3 | solubility in water | soluble | soluble | soluble | insoluble odor | | odorless | odorless |

Units

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