S + KOH = H2O + K2SO4 + K2S

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

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

+ ⟶ + + K2S

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

| mixed sulfur | potassium hydroxide | water | potassium sulfate | K2S formula | | | | | K2S Hill formula | S | HKO | H_2O | K_2O_4S | K2S name | mixed sulfur | potassium hydroxide | water | potassium sulfate | IUPAC name | sulfur | potassium hydroxide | water | dipotassium sulfate |

| mixed sulfur | potassium hydroxide | water | potassium sulfate | K2S molar mass | 32.06 g/mol | 56.105 g/mol | 18.015 g/mol | 174.25 g/mol | 110.26 g/mol phase | solid (at STP) | solid (at STP) | liquid (at STP) | | melting point | 112.8 °C | 406 °C | 0 °C | | boiling point | 444.7 °C | 1327 °C | 99.9839 °C | | density | 2.07 g/cm^3 | 2.044 g/cm^3 | 1 g/cm^3 | | solubility in water | | soluble | | soluble | surface tension | | | 0.0728 N/m | | dynamic viscosity | | 0.001 Pa s (at 550 °C) | 8.9×10^-4 Pa s (at 25 °C) | | odor | | | odorless | |