Input interpretation
hydrogen peroxide + potassium iodide ⟶ potassium hydroxide + iodine
Balanced equation
Balance the chemical equation algebraically: + ⟶ + Add stoichiometric coefficients, c_i, to the reactants and products: c_1 + c_2 ⟶ c_3 + c_4 Set the number of atoms in the reactants equal to the number of atoms in the products for H, O, I and K: H: | 2 c_1 = c_3 O: | 2 c_1 = c_3 I: | c_2 = 2 c_4 K: | c_2 = c_3 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 = 2 c_4 = 1 Substitute the coefficients into the chemical reaction to obtain the balanced equation: Answer: | | + 2 ⟶ 2 +
Structures
+ ⟶ +
Names
hydrogen peroxide + potassium iodide ⟶ potassium hydroxide + iodine
Reaction thermodynamics
Gibbs free energy
| hydrogen peroxide | potassium iodide | potassium hydroxide | iodine molecular free energy | -120.4 kJ/mol | -324.9 kJ/mol | -379.4 kJ/mol | 0 kJ/mol total free energy | -120.4 kJ/mol | -649.8 kJ/mol | -758.8 kJ/mol | 0 kJ/mol | G_initial = -770.2 kJ/mol | | G_final = -758.8 kJ/mol | ΔG_rxn^0 | -758.8 kJ/mol - -770.2 kJ/mol = 11.4 kJ/mol (endergonic) | | |
Chemical names and formulas
| hydrogen peroxide | potassium iodide | potassium hydroxide | iodine Hill formula | H_2O_2 | IK | HKO | I_2 name | hydrogen peroxide | potassium iodide | potassium hydroxide | iodine IUPAC name | hydrogen peroxide | potassium iodide | potassium hydroxide | molecular iodine
Substance properties
| hydrogen peroxide | potassium iodide | potassium hydroxide | iodine molar mass | 34.014 g/mol | 166.0028 g/mol | 56.105 g/mol | 253.80894 g/mol phase | liquid (at STP) | solid (at STP) | solid (at STP) | solid (at STP) melting point | -0.43 °C | 681 °C | 406 °C | 113 °C boiling point | 150.2 °C | 1330 °C | 1327 °C | 184 °C density | 1.44 g/cm^3 | 3.123 g/cm^3 | 2.044 g/cm^3 | 4.94 g/cm^3 solubility in water | miscible | | soluble | surface tension | 0.0804 N/m | | | dynamic viscosity | 0.001249 Pa s (at 20 °C) | 0.0010227 Pa s (at 732.9 °C) | 0.001 Pa s (at 550 °C) | 0.00227 Pa s (at 116 °C)
Units
