Input interpretation
potassium iodide + silver nitrate ⟶ potassium nitrate + silver(I) iodide
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 I, K, Ag, N and O: I: | c_1 = c_4 K: | c_1 = c_3 Ag: | c_2 = c_4 N: | c_2 = c_3 O: | 3 c_2 = 3 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 = 1 c_3 = 1 c_4 = 1 Substitute the coefficients into the chemical reaction to obtain the balanced equation: Answer: | | + ⟶ +
Structures
+ ⟶ +
Names
potassium iodide + silver nitrate ⟶ potassium nitrate + silver(I) iodide
Reaction thermodynamics
Enthalpy
| potassium iodide | silver nitrate | potassium nitrate | silver(I) iodide molecular enthalpy | -327.9 kJ/mol | -124.4 kJ/mol | -494.6 kJ/mol | -61.8 kJ/mol total enthalpy | -327.9 kJ/mol | -124.4 kJ/mol | -494.6 kJ/mol | -61.8 kJ/mol | H_initial = -452.3 kJ/mol | | H_final = -556.4 kJ/mol | ΔH_rxn^0 | -556.4 kJ/mol - -452.3 kJ/mol = -104.1 kJ/mol (exothermic) | | |
Gibbs free energy
| potassium iodide | silver nitrate | potassium nitrate | silver(I) iodide molecular free energy | -324.9 kJ/mol | -33.4 kJ/mol | -394.9 kJ/mol | -66.2 kJ/mol total free energy | -324.9 kJ/mol | -33.4 kJ/mol | -394.9 kJ/mol | -66.2 kJ/mol | G_initial = -358.3 kJ/mol | | G_final = -461.1 kJ/mol | ΔG_rxn^0 | -461.1 kJ/mol - -358.3 kJ/mol = -102.8 kJ/mol (exergonic) | | |
Chemical names and formulas
| potassium iodide | silver nitrate | potassium nitrate | silver(I) iodide Hill formula | IK | AgNO_3 | KNO_3 | AgI name | potassium iodide | silver nitrate | potassium nitrate | silver(I) iodide IUPAC name | potassium iodide | silver nitrate | potassium nitrate | silver iodide
Substance properties
| potassium iodide | silver nitrate | potassium nitrate | silver(I) iodide molar mass | 166.0028 g/mol | 169.87 g/mol | 101.1 g/mol | 234.7727 g/mol phase | solid (at STP) | solid (at STP) | solid (at STP) | solid (at STP) melting point | 681 °C | 212 °C | 334 °C | 557 °C boiling point | 1330 °C | | | 1506 °C density | 3.123 g/cm^3 | | | 5.68 g/cm^3 solubility in water | | soluble | soluble | slightly soluble dynamic viscosity | 0.0010227 Pa s (at 732.9 °C) | | | odor | | odorless | odorless |
Units
