Input interpretation
H_2O water + AlOHSO4 ⟶ H_2SO_4 sulfuric acid + Al(OH)_3 aluminum hydroxide
Balanced equation
Balance the chemical equation algebraically: H_2O + AlOHSO4 ⟶ H_2SO_4 + Al(OH)_3 Add stoichiometric coefficients, c_i, to the reactants and products: c_1 H_2O + c_2 AlOHSO4 ⟶ c_3 H_2SO_4 + c_4 Al(OH)_3 Set the number of atoms in the reactants equal to the number of atoms in the products for H, O, Al and S: H: | 2 c_1 + c_2 = 2 c_3 + 3 c_4 O: | c_1 + 5 c_2 = 4 c_3 + 3 c_4 Al: | c_2 = c_4 S: | 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_2 = 1 and solve the system of equations for the remaining coefficients: c_1 = 2 c_2 = 1 c_3 = 1 c_4 = 1 Substitute the coefficients into the chemical reaction to obtain the balanced equation: Answer: | | 2 H_2O + AlOHSO4 ⟶ H_2SO_4 + Al(OH)_3
Structures
+ AlOHSO4 ⟶ +
Names
water + AlOHSO4 ⟶ sulfuric acid + aluminum hydroxide
Equilibrium constant
Construct the equilibrium constant, K, expression for: H_2O + AlOHSO4 ⟶ H_2SO_4 + Al(OH)_3 Plan: • Balance the chemical equation. • Determine the stoichiometric numbers. • Assemble the activity expression for each chemical species. • Use the activity expressions to build the equilibrium constant expression. Write the balanced chemical equation: 2 H_2O + AlOHSO4 ⟶ H_2SO_4 + Al(OH)_3 Assign stoichiometric numbers, ν_i, using the stoichiometric coefficients, c_i, from the balanced chemical equation in the following manner: ν_i = -c_i for reactants and ν_i = c_i for products: chemical species | c_i | ν_i H_2O | 2 | -2 AlOHSO4 | 1 | -1 H_2SO_4 | 1 | 1 Al(OH)_3 | 1 | 1 Assemble the activity expressions accounting for the state of matter and ν_i: chemical species | c_i | ν_i | activity expression H_2O | 2 | -2 | ([H2O])^(-2) AlOHSO4 | 1 | -1 | ([AlOHSO4])^(-1) H_2SO_4 | 1 | 1 | [H2SO4] Al(OH)_3 | 1 | 1 | [Al(OH)3] The equilibrium constant symbol in the concentration basis is: K_c Mulitply the activity expressions to arrive at the K_c expression: Answer: | | K_c = ([H2O])^(-2) ([AlOHSO4])^(-1) [H2SO4] [Al(OH)3] = ([H2SO4] [Al(OH)3])/(([H2O])^2 [AlOHSO4])
Rate of reaction
Construct the rate of reaction expression for: H_2O + AlOHSO4 ⟶ H_2SO_4 + Al(OH)_3 Plan: • Balance the chemical equation. • Determine the stoichiometric numbers. • Assemble the rate term for each chemical species. • Write the rate of reaction expression. Write the balanced chemical equation: 2 H_2O + AlOHSO4 ⟶ H_2SO_4 + Al(OH)_3 Assign stoichiometric numbers, ν_i, using the stoichiometric coefficients, c_i, from the balanced chemical equation in the following manner: ν_i = -c_i for reactants and ν_i = c_i for products: chemical species | c_i | ν_i H_2O | 2 | -2 AlOHSO4 | 1 | -1 H_2SO_4 | 1 | 1 Al(OH)_3 | 1 | 1 The rate term for each chemical species, B_i, is 1/ν_i(Δ[B_i])/(Δt) where [B_i] is the amount concentration and t is time: chemical species | c_i | ν_i | rate term H_2O | 2 | -2 | -1/2 (Δ[H2O])/(Δt) AlOHSO4 | 1 | -1 | -(Δ[AlOHSO4])/(Δt) H_2SO_4 | 1 | 1 | (Δ[H2SO4])/(Δt) Al(OH)_3 | 1 | 1 | (Δ[Al(OH)3])/(Δt) (for infinitesimal rate of change, replace Δ with d) Set the rate terms equal to each other to arrive at the rate expression: Answer: | | rate = -1/2 (Δ[H2O])/(Δt) = -(Δ[AlOHSO4])/(Δt) = (Δ[H2SO4])/(Δt) = (Δ[Al(OH)3])/(Δt) (assuming constant volume and no accumulation of intermediates or side products)
Chemical names and formulas
| water | AlOHSO4 | sulfuric acid | aluminum hydroxide formula | H_2O | AlOHSO4 | H_2SO_4 | Al(OH)_3 Hill formula | H_2O | HAlO5S | H_2O_4S | AlH_3O_3 name | water | | sulfuric acid | aluminum hydroxide
Substance properties
| water | AlOHSO4 | sulfuric acid | aluminum hydroxide molar mass | 18.015 g/mol | 140.04 g/mol | 98.07 g/mol | 78.003 g/mol phase | liquid (at STP) | | liquid (at STP) | melting point | 0 °C | | 10.371 °C | boiling point | 99.9839 °C | | 279.6 °C | density | 1 g/cm^3 | | 1.8305 g/cm^3 | solubility in water | | | very soluble | surface tension | 0.0728 N/m | | 0.0735 N/m | dynamic viscosity | 8.9×10^-4 Pa s (at 25 °C) | | 0.021 Pa s (at 25 °C) | odor | odorless | | odorless |
Units