Input interpretation
calcium hydroxide + hydrogen fluoride ⟶ water + calcium fluoride
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 Ca, H, O and F: Ca: | c_1 = c_4 H: | 2 c_1 + c_2 = 2 c_3 O: | 2 c_1 = c_3 F: | 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 = 2 c_3 = 2 c_4 = 1 Substitute the coefficients into the chemical reaction to obtain the balanced equation: Answer: | | + 2 ⟶ 2 +
Structures
+ ⟶ +
Names
calcium hydroxide + hydrogen fluoride ⟶ water + calcium fluoride
Reaction thermodynamics
Enthalpy
| calcium hydroxide | hydrogen fluoride | water | calcium fluoride molecular enthalpy | -985.2 kJ/mol | -273.3 kJ/mol | -285.8 kJ/mol | -1228 kJ/mol total enthalpy | -985.2 kJ/mol | -546.6 kJ/mol | -571.7 kJ/mol | -1228 kJ/mol | H_initial = -1532 kJ/mol | | H_final = -1800 kJ/mol | ΔH_rxn^0 | -1800 kJ/mol - -1532 kJ/mol = -267.9 kJ/mol (exothermic) | | |
Gibbs free energy
| calcium hydroxide | hydrogen fluoride | water | calcium fluoride molecular free energy | -897.5 kJ/mol | -275.4 kJ/mol | -237.1 kJ/mol | -1176 kJ/mol total free energy | -897.5 kJ/mol | -550.8 kJ/mol | -474.2 kJ/mol | -1176 kJ/mol | G_initial = -1448 kJ/mol | | G_final = -1650 kJ/mol | ΔG_rxn^0 | -1650 kJ/mol - -1448 kJ/mol = -201.5 kJ/mol (exergonic) | | |
Chemical names and formulas
| calcium hydroxide | hydrogen fluoride | water | calcium fluoride Hill formula | CaH_2O_2 | FH | H_2O | CaF_2 name | calcium hydroxide | hydrogen fluoride | water | calcium fluoride IUPAC name | calcium dihydroxide | hydrogen fluoride | water | calcium difluoride
Substance properties
| calcium hydroxide | hydrogen fluoride | water | calcium fluoride molar mass | 74.092 g/mol | 20.006 g/mol | 18.015 g/mol | 78.075 g/mol phase | solid (at STP) | gas (at STP) | liquid (at STP) | solid (at STP) melting point | 550 °C | -83.36 °C | 0 °C | 1418 °C boiling point | | 19.5 °C | 99.9839 °C | 2500 °C density | 2.24 g/cm^3 | 8.18×10^-4 g/cm^3 (at 25 °C) | 1 g/cm^3 | 3.18 g/cm^3 solubility in water | slightly soluble | miscible | | surface tension | | | 0.0728 N/m | dynamic viscosity | | 1.2571×10^-5 Pa s (at 20 °C) | 8.9×10^-4 Pa s (at 25 °C) | odor | odorless | | odorless |
Units
