H2O + KOH + Si = H2 + K2SiO3

H_2O water + KOH potassium hydroxide + Si silicon ⟶ H_2 hydrogen + K2SiO3

Balance the chemical equation algebraically: H_2O + KOH + Si ⟶ H_2 + K2SiO3 Add stoichiometric coefficients, c_i, to the reactants and products: c_1 H_2O + c_2 KOH + c_3 Si ⟶ c_4 H_2 + c_5 K2SiO3 Set the number of atoms in the reactants equal to the number of atoms in the products for H, O, K and Si: H: | 2 c_1 + c_2 = 2 c_4 O: | c_1 + c_2 = 3 c_5 K: | c_2 = 2 c_5 Si: | c_3 = 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_1 = 1 and solve the system of equations for the remaining coefficients: c_1 = 1 c_2 = 2 c_3 = 1 c_4 = 2 c_5 = 1 Substitute the coefficients into the chemical reaction to obtain the balanced equation: Answer: | | H_2O + 2 KOH + Si ⟶ 2 H_2 + K2SiO3

+ + ⟶ + K2SiO3

water + potassium hydroxide + silicon ⟶ hydrogen + K2SiO3

K_c = ([H2]^2 [K2SiO3])/([H2O] [KOH]^2 [Si])

rate = -(Δ[H2O])/(Δt) = -1/2 (Δ[KOH])/(Δt) = -(Δ[Si])/(Δt) = 1/2 (Δ[H2])/(Δt) = (Δ[K2SiO3])/(Δt) (assuming constant volume and no accumulation of intermediates or side products)

| water | potassium hydroxide | silicon | hydrogen | K2SiO3 formula | H_2O | KOH | Si | H_2 | K2SiO3 Hill formula | H_2O | HKO | Si | H_2 | K2O3Si name | water | potassium hydroxide | silicon | hydrogen | IUPAC name | water | potassium hydroxide | silicon | molecular hydrogen |

| water | potassium hydroxide | silicon | hydrogen | K2SiO3 molar mass | 18.015 g/mol | 56.105 g/mol | 28.085 g/mol | 2.016 g/mol | 154.28 g/mol phase | liquid (at STP) | solid (at STP) | solid (at STP) | gas (at STP) | melting point | 0 °C | 406 °C | 1410 °C | -259.2 °C | boiling point | 99.9839 °C | 1327 °C | 2355 °C | -252.8 °C | density | 1 g/cm^3 | 2.044 g/cm^3 | 2.33 g/cm^3 | 8.99×10^-5 g/cm^3 (at 0 °C) | solubility in water | | soluble | insoluble | | surface tension | 0.0728 N/m | | | | dynamic viscosity | 8.9×10^-4 Pa s (at 25 °C) | 0.001 Pa s (at 550 °C) | | 8.9×10^-6 Pa s (at 25 °C) | odor | odorless | | | odorless |