Input interpretation
sulfuric acid + sodium sulfide ⟶ hydrogen sulfide + sodium sulfate
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, S and Na: H: | 2 c_1 = 2 c_3 O: | 4 c_1 = 4 c_4 S: | c_1 + c_2 = c_3 + c_4 Na: | 2 c_2 = 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 = 1 c_3 = 1 c_4 = 1 Substitute the coefficients into the chemical reaction to obtain the balanced equation: Answer: | | + ⟶ +
Structures
+ ⟶ +
Names
sulfuric acid + sodium sulfide ⟶ hydrogen sulfide + sodium sulfate
Reaction thermodynamics
Enthalpy
| sulfuric acid | sodium sulfide | hydrogen sulfide | sodium sulfate molecular enthalpy | -814 kJ/mol | -364.8 kJ/mol | -20.6 kJ/mol | -1387 kJ/mol total enthalpy | -814 kJ/mol | -364.8 kJ/mol | -20.6 kJ/mol | -1387 kJ/mol | H_initial = -1179 kJ/mol | | H_final = -1408 kJ/mol | ΔH_rxn^0 | -1408 kJ/mol - -1179 kJ/mol = -228.9 kJ/mol (exothermic) | | |
Gibbs free energy
| sulfuric acid | sodium sulfide | hydrogen sulfide | sodium sulfate molecular free energy | -690 kJ/mol | -349.8 kJ/mol | -33.4 kJ/mol | -1270 kJ/mol total free energy | -690 kJ/mol | -349.8 kJ/mol | -33.4 kJ/mol | -1270 kJ/mol | G_initial = -1040 kJ/mol | | G_final = -1304 kJ/mol | ΔG_rxn^0 | -1304 kJ/mol - -1040 kJ/mol = -263.8 kJ/mol (exergonic) | | |
Chemical names and formulas
| sulfuric acid | sodium sulfide | hydrogen sulfide | sodium sulfate Hill formula | H_2O_4S | Na_2S | H_2S | Na_2O_4S name | sulfuric acid | sodium sulfide | hydrogen sulfide | sodium sulfate IUPAC name | sulfuric acid | | hydrogen sulfide | disodium sulfate
Substance properties
| sulfuric acid | sodium sulfide | hydrogen sulfide | sodium sulfate molar mass | 98.07 g/mol | 78.04 g/mol | 34.08 g/mol | 142.04 g/mol phase | liquid (at STP) | solid (at STP) | gas (at STP) | solid (at STP) melting point | 10.371 °C | 1172 °C | -85 °C | 884 °C boiling point | 279.6 °C | | -60 °C | 1429 °C density | 1.8305 g/cm^3 | 1.856 g/cm^3 | 0.001393 g/cm^3 (at 25 °C) | 2.68 g/cm^3 solubility in water | very soluble | | | soluble surface tension | 0.0735 N/m | | | dynamic viscosity | 0.021 Pa s (at 25 °C) | | 1.239×10^-5 Pa s (at 25 °C) | odor | odorless | | |
Units
