Input interpretation
zinc + chromic chloride ⟶ zinc chloride + chromous chloride
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 Zn, Cl and Cr: Zn: | c_1 = c_3 Cl: | 3 c_2 = 2 c_3 + 2 c_4 Cr: | 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 = 2 c_3 = 1 c_4 = 2 Substitute the coefficients into the chemical reaction to obtain the balanced equation: Answer: | | + 2 ⟶ + 2
Structures
+ ⟶ +
Names
zinc + chromic chloride ⟶ zinc chloride + chromous chloride
Reaction thermodynamics
Enthalpy
| zinc | chromic chloride | zinc chloride | chromous chloride molecular enthalpy | 0 kJ/mol | -556.5 kJ/mol | -415.1 kJ/mol | -395.4 kJ/mol total enthalpy | 0 kJ/mol | -1113 kJ/mol | -415.1 kJ/mol | -790.8 kJ/mol | H_initial = -1113 kJ/mol | | H_final = -1206 kJ/mol | ΔH_rxn^0 | -1206 kJ/mol - -1113 kJ/mol = -92.9 kJ/mol (exothermic) | | |
Chemical names and formulas
| zinc | chromic chloride | zinc chloride | chromous chloride Hill formula | Zn | Cl_3Cr | Cl_2Zn | Cl_2Cr name | zinc | chromic chloride | zinc chloride | chromous chloride IUPAC name | zinc | trichlorochromium | zinc dichloride | dichlorochromium
Substance properties
| zinc | chromic chloride | zinc chloride | chromous chloride molar mass | 65.38 g/mol | 158.3 g/mol | 136.3 g/mol | 122.9 g/mol phase | solid (at STP) | solid (at STP) | solid (at STP) | solid (at STP) melting point | 420 °C | 1152 °C | 293 °C | 824 °C boiling point | 907 °C | | | 1302 °C density | 7.14 g/cm^3 | 2.87 g/cm^3 | | 2.9 g/cm^3 solubility in water | insoluble | slightly soluble | soluble | soluble odor | odorless | | odorless |
Units
