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KOH + SO2 = H2O + K2SO4 + K2S

Input interpretation

KOH potassium hydroxide + SO_2 sulfur dioxide ⟶ H_2O water + K_2SO_4 potassium sulfate + K2S
KOH potassium hydroxide + SO_2 sulfur dioxide ⟶ H_2O water + K_2SO_4 potassium sulfate + K2S

Balanced equation

Balance the chemical equation algebraically: KOH + SO_2 ⟶ H_2O + K_2SO_4 + K2S Add stoichiometric coefficients, c_i, to the reactants and products: c_1 KOH + c_2 SO_2 ⟶ c_3 H_2O + c_4 K_2SO_4 + c_5 K2S Set the number of atoms in the reactants equal to the number of atoms in the products for H, K, O and S: H: | c_1 = 2 c_3 K: | c_1 = 2 c_4 + 2 c_5 O: | c_1 + 2 c_2 = c_3 + 4 c_4 S: | c_2 = c_4 + c_5 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_5 = 1 and solve the system of equations for the remaining coefficients: c_1 = 8 c_2 = 4 c_3 = 4 c_4 = 3 c_5 = 1 Substitute the coefficients into the chemical reaction to obtain the balanced equation: Answer: | | 8 KOH + 4 SO_2 ⟶ 4 H_2O + 3 K_2SO_4 + K2S
Balance the chemical equation algebraically: KOH + SO_2 ⟶ H_2O + K_2SO_4 + K2S Add stoichiometric coefficients, c_i, to the reactants and products: c_1 KOH + c_2 SO_2 ⟶ c_3 H_2O + c_4 K_2SO_4 + c_5 K2S Set the number of atoms in the reactants equal to the number of atoms in the products for H, K, O and S: H: | c_1 = 2 c_3 K: | c_1 = 2 c_4 + 2 c_5 O: | c_1 + 2 c_2 = c_3 + 4 c_4 S: | c_2 = c_4 + c_5 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_5 = 1 and solve the system of equations for the remaining coefficients: c_1 = 8 c_2 = 4 c_3 = 4 c_4 = 3 c_5 = 1 Substitute the coefficients into the chemical reaction to obtain the balanced equation: Answer: | | 8 KOH + 4 SO_2 ⟶ 4 H_2O + 3 K_2SO_4 + K2S

Structures

+ ⟶ + + K2S
+ ⟶ + + K2S

Names

potassium hydroxide + sulfur dioxide ⟶ water + potassium sulfate + K2S
potassium hydroxide + sulfur dioxide ⟶ water + potassium sulfate + K2S

Equilibrium constant

Construct the equilibrium constant, K, expression for: KOH + SO_2 ⟶ H_2O + K_2SO_4 + K2S 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: 8 KOH + 4 SO_2 ⟶ 4 H_2O + 3 K_2SO_4 + K2S 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 KOH | 8 | -8 SO_2 | 4 | -4 H_2O | 4 | 4 K_2SO_4 | 3 | 3 K2S | 1 | 1 Assemble the activity expressions accounting for the state of matter and ν_i: chemical species | c_i | ν_i | activity expression KOH | 8 | -8 | ([KOH])^(-8) SO_2 | 4 | -4 | ([SO2])^(-4) H_2O | 4 | 4 | ([H2O])^4 K_2SO_4 | 3 | 3 | ([K2SO4])^3 K2S | 1 | 1 | [K2S] 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 = ([KOH])^(-8) ([SO2])^(-4) ([H2O])^4 ([K2SO4])^3 [K2S] = (([H2O])^4 ([K2SO4])^3 [K2S])/(([KOH])^8 ([SO2])^4)
Construct the equilibrium constant, K, expression for: KOH + SO_2 ⟶ H_2O + K_2SO_4 + K2S 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: 8 KOH + 4 SO_2 ⟶ 4 H_2O + 3 K_2SO_4 + K2S 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 KOH | 8 | -8 SO_2 | 4 | -4 H_2O | 4 | 4 K_2SO_4 | 3 | 3 K2S | 1 | 1 Assemble the activity expressions accounting for the state of matter and ν_i: chemical species | c_i | ν_i | activity expression KOH | 8 | -8 | ([KOH])^(-8) SO_2 | 4 | -4 | ([SO2])^(-4) H_2O | 4 | 4 | ([H2O])^4 K_2SO_4 | 3 | 3 | ([K2SO4])^3 K2S | 1 | 1 | [K2S] 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 = ([KOH])^(-8) ([SO2])^(-4) ([H2O])^4 ([K2SO4])^3 [K2S] = (([H2O])^4 ([K2SO4])^3 [K2S])/(([KOH])^8 ([SO2])^4)

Rate of reaction

Construct the rate of reaction expression for: KOH + SO_2 ⟶ H_2O + K_2SO_4 + K2S 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: 8 KOH + 4 SO_2 ⟶ 4 H_2O + 3 K_2SO_4 + K2S 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 KOH | 8 | -8 SO_2 | 4 | -4 H_2O | 4 | 4 K_2SO_4 | 3 | 3 K2S | 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 KOH | 8 | -8 | -1/8 (Δ[KOH])/(Δt) SO_2 | 4 | -4 | -1/4 (Δ[SO2])/(Δt) H_2O | 4 | 4 | 1/4 (Δ[H2O])/(Δt) K_2SO_4 | 3 | 3 | 1/3 (Δ[K2SO4])/(Δt) K2S | 1 | 1 | (Δ[K2S])/(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 = -1/8 (Δ[KOH])/(Δt) = -1/4 (Δ[SO2])/(Δt) = 1/4 (Δ[H2O])/(Δt) = 1/3 (Δ[K2SO4])/(Δt) = (Δ[K2S])/(Δt) (assuming constant volume and no accumulation of intermediates or side products)
Construct the rate of reaction expression for: KOH + SO_2 ⟶ H_2O + K_2SO_4 + K2S 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: 8 KOH + 4 SO_2 ⟶ 4 H_2O + 3 K_2SO_4 + K2S 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 KOH | 8 | -8 SO_2 | 4 | -4 H_2O | 4 | 4 K_2SO_4 | 3 | 3 K2S | 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 KOH | 8 | -8 | -1/8 (Δ[KOH])/(Δt) SO_2 | 4 | -4 | -1/4 (Δ[SO2])/(Δt) H_2O | 4 | 4 | 1/4 (Δ[H2O])/(Δt) K_2SO_4 | 3 | 3 | 1/3 (Δ[K2SO4])/(Δt) K2S | 1 | 1 | (Δ[K2S])/(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 = -1/8 (Δ[KOH])/(Δt) = -1/4 (Δ[SO2])/(Δt) = 1/4 (Δ[H2O])/(Δt) = 1/3 (Δ[K2SO4])/(Δt) = (Δ[K2S])/(Δt) (assuming constant volume and no accumulation of intermediates or side products)

Chemical names and formulas

| potassium hydroxide | sulfur dioxide | water | potassium sulfate | K2S formula | KOH | SO_2 | H_2O | K_2SO_4 | K2S Hill formula | HKO | O_2S | H_2O | K_2O_4S | K2S name | potassium hydroxide | sulfur dioxide | water | potassium sulfate | IUPAC name | potassium hydroxide | sulfur dioxide | water | dipotassium sulfate |
| potassium hydroxide | sulfur dioxide | water | potassium sulfate | K2S formula | KOH | SO_2 | H_2O | K_2SO_4 | K2S Hill formula | HKO | O_2S | H_2O | K_2O_4S | K2S name | potassium hydroxide | sulfur dioxide | water | potassium sulfate | IUPAC name | potassium hydroxide | sulfur dioxide | water | dipotassium sulfate |

Substance properties

| potassium hydroxide | sulfur dioxide | water | potassium sulfate | K2S molar mass | 56.105 g/mol | 64.06 g/mol | 18.015 g/mol | 174.25 g/mol | 110.26 g/mol phase | solid (at STP) | gas (at STP) | liquid (at STP) | | melting point | 406 °C | -73 °C | 0 °C | | boiling point | 1327 °C | -10 °C | 99.9839 °C | | density | 2.044 g/cm^3 | 0.002619 g/cm^3 (at 25 °C) | 1 g/cm^3 | | solubility in water | soluble | | | soluble | surface tension | | 0.02859 N/m | 0.0728 N/m | | dynamic viscosity | 0.001 Pa s (at 550 °C) | 1.282×10^-5 Pa s (at 25 °C) | 8.9×10^-4 Pa s (at 25 °C) | | odor | | | odorless | |
| potassium hydroxide | sulfur dioxide | water | potassium sulfate | K2S molar mass | 56.105 g/mol | 64.06 g/mol | 18.015 g/mol | 174.25 g/mol | 110.26 g/mol phase | solid (at STP) | gas (at STP) | liquid (at STP) | | melting point | 406 °C | -73 °C | 0 °C | | boiling point | 1327 °C | -10 °C | 99.9839 °C | | density | 2.044 g/cm^3 | 0.002619 g/cm^3 (at 25 °C) | 1 g/cm^3 | | solubility in water | soluble | | | soluble | surface tension | | 0.02859 N/m | 0.0728 N/m | | dynamic viscosity | 0.001 Pa s (at 550 °C) | 1.282×10^-5 Pa s (at 25 °C) | 8.9×10^-4 Pa s (at 25 °C) | | odor | | | odorless | |

Units

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