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HF + CH2Cl2 = HCl + CH2FCl

Input interpretation

HF hydrogen fluoride + CH_2Cl_2 methylene chloride ⟶ HCl hydrogen chloride + CH2FCl
HF hydrogen fluoride + CH_2Cl_2 methylene chloride ⟶ HCl hydrogen chloride + CH2FCl

Balanced equation

Balance the chemical equation algebraically: HF + CH_2Cl_2 ⟶ HCl + CH2FCl Add stoichiometric coefficients, c_i, to the reactants and products: c_1 HF + c_2 CH_2Cl_2 ⟶ c_3 HCl + c_4 CH2FCl Set the number of atoms in the reactants equal to the number of atoms in the products for F, H, C and Cl: F: | c_1 = c_4 H: | c_1 + 2 c_2 = c_3 + 2 c_4 C: | c_2 = c_4 Cl: | 2 c_2 = c_3 + 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_1 = 1 and solve the system of equations for the remaining coefficients: c_1 = 1 c_2 = 1 c_3 = 1 c_4 = 1 Substitute the coefficients into the chemical reaction to obtain the balanced equation: Answer: | | HF + CH_2Cl_2 ⟶ HCl + CH2FCl
Balance the chemical equation algebraically: HF + CH_2Cl_2 ⟶ HCl + CH2FCl Add stoichiometric coefficients, c_i, to the reactants and products: c_1 HF + c_2 CH_2Cl_2 ⟶ c_3 HCl + c_4 CH2FCl Set the number of atoms in the reactants equal to the number of atoms in the products for F, H, C and Cl: F: | c_1 = c_4 H: | c_1 + 2 c_2 = c_3 + 2 c_4 C: | c_2 = c_4 Cl: | 2 c_2 = c_3 + 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_1 = 1 and solve the system of equations for the remaining coefficients: c_1 = 1 c_2 = 1 c_3 = 1 c_4 = 1 Substitute the coefficients into the chemical reaction to obtain the balanced equation: Answer: | | HF + CH_2Cl_2 ⟶ HCl + CH2FCl

Structures

+ ⟶ + CH2FCl
+ ⟶ + CH2FCl

Names

hydrogen fluoride + methylene chloride ⟶ hydrogen chloride + CH2FCl
hydrogen fluoride + methylene chloride ⟶ hydrogen chloride + CH2FCl

Equilibrium constant

Construct the equilibrium constant, K, expression for: HF + CH_2Cl_2 ⟶ HCl + CH2FCl 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: HF + CH_2Cl_2 ⟶ HCl + CH2FCl 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 HF | 1 | -1 CH_2Cl_2 | 1 | -1 HCl | 1 | 1 CH2FCl | 1 | 1 Assemble the activity expressions accounting for the state of matter and ν_i: chemical species | c_i | ν_i | activity expression HF | 1 | -1 | ([HF])^(-1) CH_2Cl_2 | 1 | -1 | ([CH2Cl2])^(-1) HCl | 1 | 1 | [HCl] CH2FCl | 1 | 1 | [CH2FCl] 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 = ([HF])^(-1) ([CH2Cl2])^(-1) [HCl] [CH2FCl] = ([HCl] [CH2FCl])/([HF] [CH2Cl2])
Construct the equilibrium constant, K, expression for: HF + CH_2Cl_2 ⟶ HCl + CH2FCl 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: HF + CH_2Cl_2 ⟶ HCl + CH2FCl 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 HF | 1 | -1 CH_2Cl_2 | 1 | -1 HCl | 1 | 1 CH2FCl | 1 | 1 Assemble the activity expressions accounting for the state of matter and ν_i: chemical species | c_i | ν_i | activity expression HF | 1 | -1 | ([HF])^(-1) CH_2Cl_2 | 1 | -1 | ([CH2Cl2])^(-1) HCl | 1 | 1 | [HCl] CH2FCl | 1 | 1 | [CH2FCl] 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 = ([HF])^(-1) ([CH2Cl2])^(-1) [HCl] [CH2FCl] = ([HCl] [CH2FCl])/([HF] [CH2Cl2])

Rate of reaction

Construct the rate of reaction expression for: HF + CH_2Cl_2 ⟶ HCl + CH2FCl 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: HF + CH_2Cl_2 ⟶ HCl + CH2FCl 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 HF | 1 | -1 CH_2Cl_2 | 1 | -1 HCl | 1 | 1 CH2FCl | 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 HF | 1 | -1 | -(Δ[HF])/(Δt) CH_2Cl_2 | 1 | -1 | -(Δ[CH2Cl2])/(Δt) HCl | 1 | 1 | (Δ[HCl])/(Δt) CH2FCl | 1 | 1 | (Δ[CH2FCl])/(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[HF])/(Δt) = -(Δ[CH2Cl2])/(Δt) = (Δ[HCl])/(Δt) = (Δ[CH2FCl])/(Δt) (assuming constant volume and no accumulation of intermediates or side products)
Construct the rate of reaction expression for: HF + CH_2Cl_2 ⟶ HCl + CH2FCl 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: HF + CH_2Cl_2 ⟶ HCl + CH2FCl 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 HF | 1 | -1 CH_2Cl_2 | 1 | -1 HCl | 1 | 1 CH2FCl | 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 HF | 1 | -1 | -(Δ[HF])/(Δt) CH_2Cl_2 | 1 | -1 | -(Δ[CH2Cl2])/(Δt) HCl | 1 | 1 | (Δ[HCl])/(Δt) CH2FCl | 1 | 1 | (Δ[CH2FCl])/(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[HF])/(Δt) = -(Δ[CH2Cl2])/(Δt) = (Δ[HCl])/(Δt) = (Δ[CH2FCl])/(Δt) (assuming constant volume and no accumulation of intermediates or side products)

Chemical names and formulas

| hydrogen fluoride | methylene chloride | hydrogen chloride | CH2FCl formula | HF | CH_2Cl_2 | HCl | CH2FCl Hill formula | FH | CH_2Cl_2 | ClH | CH2ClF name | hydrogen fluoride | methylene chloride | hydrogen chloride | IUPAC name | hydrogen fluoride | dichloromethane | hydrogen chloride |
| hydrogen fluoride | methylene chloride | hydrogen chloride | CH2FCl formula | HF | CH_2Cl_2 | HCl | CH2FCl Hill formula | FH | CH_2Cl_2 | ClH | CH2ClF name | hydrogen fluoride | methylene chloride | hydrogen chloride | IUPAC name | hydrogen fluoride | dichloromethane | hydrogen chloride |

Substance properties

| hydrogen fluoride | methylene chloride | hydrogen chloride | CH2FCl molar mass | 20.006 g/mol | 84.93 g/mol | 36.46 g/mol | 68.48 g/mol phase | gas (at STP) | liquid (at STP) | gas (at STP) | melting point | -83.36 °C | -97 °C | -114.17 °C | boiling point | 19.5 °C | 39.9 °C | -85 °C | density | 8.18×10^-4 g/cm^3 (at 25 °C) | 1.325 g/cm^3 | 0.00149 g/cm^3 (at 25 °C) | solubility in water | miscible | | miscible | surface tension | | 0.02736 N/m | | dynamic viscosity | 1.2571×10^-5 Pa s (at 20 °C) | 4.13×10^-4 Pa s (at 25 °C) | | odor | | chloroform-like | |
| hydrogen fluoride | methylene chloride | hydrogen chloride | CH2FCl molar mass | 20.006 g/mol | 84.93 g/mol | 36.46 g/mol | 68.48 g/mol phase | gas (at STP) | liquid (at STP) | gas (at STP) | melting point | -83.36 °C | -97 °C | -114.17 °C | boiling point | 19.5 °C | 39.9 °C | -85 °C | density | 8.18×10^-4 g/cm^3 (at 25 °C) | 1.325 g/cm^3 | 0.00149 g/cm^3 (at 25 °C) | solubility in water | miscible | | miscible | surface tension | | 0.02736 N/m | | dynamic viscosity | 1.2571×10^-5 Pa s (at 20 °C) | 4.13×10^-4 Pa s (at 25 °C) | | odor | | chloroform-like | |

Units

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