Input interpretation
![Mg(OH)_2 magnesium hydroxide + H_2CO_3 carbonic acid ⟶ H_2O water + MgCO_3 magnesium carbonate](../image_source/fe906c2abe6bb6a1ae17f93bc4b3ca9d.png)
Mg(OH)_2 magnesium hydroxide + H_2CO_3 carbonic acid ⟶ H_2O water + MgCO_3 magnesium carbonate
Balanced equation
![Balance the chemical equation algebraically: Mg(OH)_2 + H_2CO_3 ⟶ H_2O + MgCO_3 Add stoichiometric coefficients, c_i, to the reactants and products: c_1 Mg(OH)_2 + c_2 H_2CO_3 ⟶ c_3 H_2O + c_4 MgCO_3 Set the number of atoms in the reactants equal to the number of atoms in the products for H, Mg, O and C: H: | 2 c_1 + 2 c_2 = 2 c_3 Mg: | c_1 = c_4 O: | 2 c_1 + 3 c_2 = c_3 + 3 c_4 C: | 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 = 1 c_3 = 2 c_4 = 1 Substitute the coefficients into the chemical reaction to obtain the balanced equation: Answer: | | Mg(OH)_2 + H_2CO_3 ⟶ 2 H_2O + MgCO_3](../image_source/ea69e60450bbb92cd9b68bf510f8a5a4.png)
Balance the chemical equation algebraically: Mg(OH)_2 + H_2CO_3 ⟶ H_2O + MgCO_3 Add stoichiometric coefficients, c_i, to the reactants and products: c_1 Mg(OH)_2 + c_2 H_2CO_3 ⟶ c_3 H_2O + c_4 MgCO_3 Set the number of atoms in the reactants equal to the number of atoms in the products for H, Mg, O and C: H: | 2 c_1 + 2 c_2 = 2 c_3 Mg: | c_1 = c_4 O: | 2 c_1 + 3 c_2 = c_3 + 3 c_4 C: | 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 = 1 c_3 = 2 c_4 = 1 Substitute the coefficients into the chemical reaction to obtain the balanced equation: Answer: | | Mg(OH)_2 + H_2CO_3 ⟶ 2 H_2O + MgCO_3
Structures
![+ ⟶ +](../image_source/d7805b146dbc51e7f6c4b5d00b4d2bde.png)
+ ⟶ +
Names
![magnesium hydroxide + carbonic acid ⟶ water + magnesium carbonate](../image_source/650b0d8cf6759dcbf8b94ea5bf21a8d1.png)
magnesium hydroxide + carbonic acid ⟶ water + magnesium carbonate
Equilibrium constant
![Construct the equilibrium constant, K, expression for: Mg(OH)_2 + H_2CO_3 ⟶ H_2O + MgCO_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: Mg(OH)_2 + H_2CO_3 ⟶ 2 H_2O + MgCO_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 Mg(OH)_2 | 1 | -1 H_2CO_3 | 1 | -1 H_2O | 2 | 2 MgCO_3 | 1 | 1 Assemble the activity expressions accounting for the state of matter and ν_i: chemical species | c_i | ν_i | activity expression Mg(OH)_2 | 1 | -1 | ([Mg(OH)2])^(-1) H_2CO_3 | 1 | -1 | ([H2CO3])^(-1) H_2O | 2 | 2 | ([H2O])^2 MgCO_3 | 1 | 1 | [MgCO3] 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 = ([Mg(OH)2])^(-1) ([H2CO3])^(-1) ([H2O])^2 [MgCO3] = (([H2O])^2 [MgCO3])/([Mg(OH)2] [H2CO3])](../image_source/10293e9523dcd5f16570e41462a85a59.png)
Construct the equilibrium constant, K, expression for: Mg(OH)_2 + H_2CO_3 ⟶ H_2O + MgCO_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: Mg(OH)_2 + H_2CO_3 ⟶ 2 H_2O + MgCO_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 Mg(OH)_2 | 1 | -1 H_2CO_3 | 1 | -1 H_2O | 2 | 2 MgCO_3 | 1 | 1 Assemble the activity expressions accounting for the state of matter and ν_i: chemical species | c_i | ν_i | activity expression Mg(OH)_2 | 1 | -1 | ([Mg(OH)2])^(-1) H_2CO_3 | 1 | -1 | ([H2CO3])^(-1) H_2O | 2 | 2 | ([H2O])^2 MgCO_3 | 1 | 1 | [MgCO3] 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 = ([Mg(OH)2])^(-1) ([H2CO3])^(-1) ([H2O])^2 [MgCO3] = (([H2O])^2 [MgCO3])/([Mg(OH)2] [H2CO3])
Rate of reaction
![Construct the rate of reaction expression for: Mg(OH)_2 + H_2CO_3 ⟶ H_2O + MgCO_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: Mg(OH)_2 + H_2CO_3 ⟶ 2 H_2O + MgCO_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 Mg(OH)_2 | 1 | -1 H_2CO_3 | 1 | -1 H_2O | 2 | 2 MgCO_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 Mg(OH)_2 | 1 | -1 | -(Δ[Mg(OH)2])/(Δt) H_2CO_3 | 1 | -1 | -(Δ[H2CO3])/(Δt) H_2O | 2 | 2 | 1/2 (Δ[H2O])/(Δt) MgCO_3 | 1 | 1 | (Δ[MgCO3])/(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 = -(Δ[Mg(OH)2])/(Δt) = -(Δ[H2CO3])/(Δt) = 1/2 (Δ[H2O])/(Δt) = (Δ[MgCO3])/(Δt) (assuming constant volume and no accumulation of intermediates or side products)](../image_source/401b78a85eebc6274014597b38ff923c.png)
Construct the rate of reaction expression for: Mg(OH)_2 + H_2CO_3 ⟶ H_2O + MgCO_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: Mg(OH)_2 + H_2CO_3 ⟶ 2 H_2O + MgCO_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 Mg(OH)_2 | 1 | -1 H_2CO_3 | 1 | -1 H_2O | 2 | 2 MgCO_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 Mg(OH)_2 | 1 | -1 | -(Δ[Mg(OH)2])/(Δt) H_2CO_3 | 1 | -1 | -(Δ[H2CO3])/(Δt) H_2O | 2 | 2 | 1/2 (Δ[H2O])/(Δt) MgCO_3 | 1 | 1 | (Δ[MgCO3])/(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 = -(Δ[Mg(OH)2])/(Δt) = -(Δ[H2CO3])/(Δt) = 1/2 (Δ[H2O])/(Δt) = (Δ[MgCO3])/(Δt) (assuming constant volume and no accumulation of intermediates or side products)
Chemical names and formulas
![| magnesium hydroxide | carbonic acid | water | magnesium carbonate formula | Mg(OH)_2 | H_2CO_3 | H_2O | MgCO_3 Hill formula | H_2MgO_2 | CH_2O_3 | H_2O | CMgO_3 name | magnesium hydroxide | carbonic acid | water | magnesium carbonate IUPAC name | magnesium dihydroxide | carbonic acid | water | magnesium carbonate](../image_source/5c32d0baa2a233203c1d85f2067c3867.png)
| magnesium hydroxide | carbonic acid | water | magnesium carbonate formula | Mg(OH)_2 | H_2CO_3 | H_2O | MgCO_3 Hill formula | H_2MgO_2 | CH_2O_3 | H_2O | CMgO_3 name | magnesium hydroxide | carbonic acid | water | magnesium carbonate IUPAC name | magnesium dihydroxide | carbonic acid | water | magnesium carbonate
Substance properties
![| magnesium hydroxide | carbonic acid | water | magnesium carbonate molar mass | 58.319 g/mol | 62.024 g/mol | 18.015 g/mol | 84.313 g/mol phase | solid (at STP) | | liquid (at STP) | melting point | 350 °C | | 0 °C | boiling point | | | 99.9839 °C | density | 2.3446 g/cm^3 | | 1 g/cm^3 | solubility in water | insoluble | | | surface tension | | | 0.0728 N/m | dynamic viscosity | | | 8.9×10^-4 Pa s (at 25 °C) | odor | | | odorless |](../image_source/a4a6f5f3b509cc00cbd1608f55fdc1e4.png)
| magnesium hydroxide | carbonic acid | water | magnesium carbonate molar mass | 58.319 g/mol | 62.024 g/mol | 18.015 g/mol | 84.313 g/mol phase | solid (at STP) | | liquid (at STP) | melting point | 350 °C | | 0 °C | boiling point | | | 99.9839 °C | density | 2.3446 g/cm^3 | | 1 g/cm^3 | solubility in water | insoluble | | | surface tension | | | 0.0728 N/m | dynamic viscosity | | | 8.9×10^-4 Pa s (at 25 °C) | odor | | | odorless |
Units