H2SO4 + K2SiO3 = K2SO4 + H2SiO3

H_2SO_4 sulfuric acid + K2SiO3 ⟶ K_2SO_4 potassium sulfate + H_2O_3Si metasilicic acid

Balance the chemical equation algebraically: H_2SO_4 + K2SiO3 ⟶ K_2SO_4 + H_2O_3Si Add stoichiometric coefficients, c_i, to the reactants and products: c_1 H_2SO_4 + c_2 K2SiO3 ⟶ c_3 K_2SO_4 + c_4 H_2O_3Si Set the number of atoms in the reactants equal to the number of atoms in the products for H, O, S, K and Si: H: | 2 c_1 = 2 c_4 O: | 4 c_1 + 3 c_2 = 4 c_3 + 3 c_4 S: | c_1 = c_3 K: | 2 c_2 = 2 c_3 Si: | c_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_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: | | H_2SO_4 + K2SiO3 ⟶ K_2SO_4 + H_2O_3Si

+ K2SiO3 ⟶ +

sulfuric acid + K2SiO3 ⟶ potassium sulfate + metasilicic acid

Construct the equilibrium constant, K, expression for: H_2SO_4 + K2SiO3 ⟶ K_2SO_4 + H_2O_3Si 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: H_2SO_4 + K2SiO3 ⟶ K_2SO_4 + H_2O_3Si 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 H_2SO_4 | 1 | -1 K2SiO3 | 1 | -1 K_2SO_4 | 1 | 1 H_2O_3Si | 1 | 1 Assemble the activity expressions accounting for the state of matter and ν_i: chemical species | c_i | ν_i | activity expression H_2SO_4 | 1 | -1 | ([H2SO4])^(-1) K2SiO3 | 1 | -1 | ([K2SiO3])^(-1) K_2SO_4 | 1 | 1 | [K2SO4] H_2O_3Si | 1 | 1 | [H2O3Si] 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 = ([H2SO4])^(-1) ([K2SiO3])^(-1) [K2SO4] [H2O3Si] = ([K2SO4] [H2O3Si])/([H2SO4] [K2SiO3])

Construct the rate of reaction expression for: H_2SO_4 + K2SiO3 ⟶ K_2SO_4 + H_2O_3Si 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: H_2SO_4 + K2SiO3 ⟶ K_2SO_4 + H_2O_3Si 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 H_2SO_4 | 1 | -1 K2SiO3 | 1 | -1 K_2SO_4 | 1 | 1 H_2O_3Si | 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 H_2SO_4 | 1 | -1 | -(Δ[H2SO4])/(Δt) K2SiO3 | 1 | -1 | -(Δ[K2SiO3])/(Δt) K_2SO_4 | 1 | 1 | (Δ[K2SO4])/(Δt) H_2O_3Si | 1 | 1 | (Δ[H2O3Si])/(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[H2SO4])/(Δt) = -(Δ[K2SiO3])/(Δt) = (Δ[K2SO4])/(Δt) = (Δ[H2O3Si])/(Δt) (assuming constant volume and no accumulation of intermediates or side products)

| sulfuric acid | K2SiO3 | potassium sulfate | metasilicic acid formula | H_2SO_4 | K2SiO3 | K_2SO_4 | H_2O_3Si Hill formula | H_2O_4S | K2O3Si | K_2O_4S | H_2O_3Si name | sulfuric acid | | potassium sulfate | metasilicic acid IUPAC name | sulfuric acid | | dipotassium sulfate | dihydroxy-oxo-silane

| sulfuric acid | K2SiO3 | potassium sulfate | metasilicic acid molar mass | 98.07 g/mol | 154.28 g/mol | 174.25 g/mol | 78.098 g/mol phase | liquid (at STP) | | | solid (at STP) melting point | 10.371 °C | | | 1704 °C boiling point | 279.6 °C | | | density | 1.8305 g/cm^3 | | | 1 g/cm^3 solubility in water | very soluble | | soluble | surface tension | 0.0735 N/m | | | dynamic viscosity | 0.021 Pa s (at 25 °C) | | | odor | odorless | | |