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HNO3 + Cr(OH)3 = H2O + Cr(NO3)3

Input interpretation

HNO_3 nitric acid + Cr(OH)3 ⟶ H_2O water + CrN_3O_9 chromium nitrate
HNO_3 nitric acid + Cr(OH)3 ⟶ H_2O water + CrN_3O_9 chromium nitrate

Balanced equation

Balance the chemical equation algebraically: HNO_3 + Cr(OH)3 ⟶ H_2O + CrN_3O_9 Add stoichiometric coefficients, c_i, to the reactants and products: c_1 HNO_3 + c_2 Cr(OH)3 ⟶ c_3 H_2O + c_4 CrN_3O_9 Set the number of atoms in the reactants equal to the number of atoms in the products for H, N, O and Cr: H: | c_1 + 3 c_2 = 2 c_3 N: | c_1 = 3 c_4 O: | 3 c_1 + 3 c_2 = c_3 + 9 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_2 = 1 and solve the system of equations for the remaining coefficients: c_1 = 3 c_2 = 1 c_3 = 3 c_4 = 1 Substitute the coefficients into the chemical reaction to obtain the balanced equation: Answer: | | 3 HNO_3 + Cr(OH)3 ⟶ 3 H_2O + CrN_3O_9
Balance the chemical equation algebraically: HNO_3 + Cr(OH)3 ⟶ H_2O + CrN_3O_9 Add stoichiometric coefficients, c_i, to the reactants and products: c_1 HNO_3 + c_2 Cr(OH)3 ⟶ c_3 H_2O + c_4 CrN_3O_9 Set the number of atoms in the reactants equal to the number of atoms in the products for H, N, O and Cr: H: | c_1 + 3 c_2 = 2 c_3 N: | c_1 = 3 c_4 O: | 3 c_1 + 3 c_2 = c_3 + 9 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_2 = 1 and solve the system of equations for the remaining coefficients: c_1 = 3 c_2 = 1 c_3 = 3 c_4 = 1 Substitute the coefficients into the chemical reaction to obtain the balanced equation: Answer: | | 3 HNO_3 + Cr(OH)3 ⟶ 3 H_2O + CrN_3O_9

Structures

+ Cr(OH)3 ⟶ +
+ Cr(OH)3 ⟶ +

Names

nitric acid + Cr(OH)3 ⟶ water + chromium nitrate
nitric acid + Cr(OH)3 ⟶ water + chromium nitrate

Equilibrium constant

Construct the equilibrium constant, K, expression for: HNO_3 + Cr(OH)3 ⟶ H_2O + CrN_3O_9 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: 3 HNO_3 + Cr(OH)3 ⟶ 3 H_2O + CrN_3O_9 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 HNO_3 | 3 | -3 Cr(OH)3 | 1 | -1 H_2O | 3 | 3 CrN_3O_9 | 1 | 1 Assemble the activity expressions accounting for the state of matter and ν_i: chemical species | c_i | ν_i | activity expression HNO_3 | 3 | -3 | ([HNO3])^(-3) Cr(OH)3 | 1 | -1 | ([Cr(OH)3])^(-1) H_2O | 3 | 3 | ([H2O])^3 CrN_3O_9 | 1 | 1 | [CrN3O9] 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 = ([HNO3])^(-3) ([Cr(OH)3])^(-1) ([H2O])^3 [CrN3O9] = (([H2O])^3 [CrN3O9])/(([HNO3])^3 [Cr(OH)3])
Construct the equilibrium constant, K, expression for: HNO_3 + Cr(OH)3 ⟶ H_2O + CrN_3O_9 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: 3 HNO_3 + Cr(OH)3 ⟶ 3 H_2O + CrN_3O_9 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 HNO_3 | 3 | -3 Cr(OH)3 | 1 | -1 H_2O | 3 | 3 CrN_3O_9 | 1 | 1 Assemble the activity expressions accounting for the state of matter and ν_i: chemical species | c_i | ν_i | activity expression HNO_3 | 3 | -3 | ([HNO3])^(-3) Cr(OH)3 | 1 | -1 | ([Cr(OH)3])^(-1) H_2O | 3 | 3 | ([H2O])^3 CrN_3O_9 | 1 | 1 | [CrN3O9] 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 = ([HNO3])^(-3) ([Cr(OH)3])^(-1) ([H2O])^3 [CrN3O9] = (([H2O])^3 [CrN3O9])/(([HNO3])^3 [Cr(OH)3])

Rate of reaction

Construct the rate of reaction expression for: HNO_3 + Cr(OH)3 ⟶ H_2O + CrN_3O_9 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: 3 HNO_3 + Cr(OH)3 ⟶ 3 H_2O + CrN_3O_9 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 HNO_3 | 3 | -3 Cr(OH)3 | 1 | -1 H_2O | 3 | 3 CrN_3O_9 | 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 HNO_3 | 3 | -3 | -1/3 (Δ[HNO3])/(Δt) Cr(OH)3 | 1 | -1 | -(Δ[Cr(OH)3])/(Δt) H_2O | 3 | 3 | 1/3 (Δ[H2O])/(Δt) CrN_3O_9 | 1 | 1 | (Δ[CrN3O9])/(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 = -1/3 (Δ[HNO3])/(Δt) = -(Δ[Cr(OH)3])/(Δt) = 1/3 (Δ[H2O])/(Δt) = (Δ[CrN3O9])/(Δt) (assuming constant volume and no accumulation of intermediates or side products)
Construct the rate of reaction expression for: HNO_3 + Cr(OH)3 ⟶ H_2O + CrN_3O_9 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: 3 HNO_3 + Cr(OH)3 ⟶ 3 H_2O + CrN_3O_9 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 HNO_3 | 3 | -3 Cr(OH)3 | 1 | -1 H_2O | 3 | 3 CrN_3O_9 | 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 HNO_3 | 3 | -3 | -1/3 (Δ[HNO3])/(Δt) Cr(OH)3 | 1 | -1 | -(Δ[Cr(OH)3])/(Δt) H_2O | 3 | 3 | 1/3 (Δ[H2O])/(Δt) CrN_3O_9 | 1 | 1 | (Δ[CrN3O9])/(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 = -1/3 (Δ[HNO3])/(Δt) = -(Δ[Cr(OH)3])/(Δt) = 1/3 (Δ[H2O])/(Δt) = (Δ[CrN3O9])/(Δt) (assuming constant volume and no accumulation of intermediates or side products)

Chemical names and formulas

| nitric acid | Cr(OH)3 | water | chromium nitrate formula | HNO_3 | Cr(OH)3 | H_2O | CrN_3O_9 Hill formula | HNO_3 | H3CrO3 | H_2O | CrN_3O_9 name | nitric acid | | water | chromium nitrate IUPAC name | nitric acid | | water | chromium(+3) cation trinitrate
| nitric acid | Cr(OH)3 | water | chromium nitrate formula | HNO_3 | Cr(OH)3 | H_2O | CrN_3O_9 Hill formula | HNO_3 | H3CrO3 | H_2O | CrN_3O_9 name | nitric acid | | water | chromium nitrate IUPAC name | nitric acid | | water | chromium(+3) cation trinitrate

Substance properties

| nitric acid | Cr(OH)3 | water | chromium nitrate molar mass | 63.012 g/mol | 103.02 g/mol | 18.015 g/mol | 238.01 g/mol phase | liquid (at STP) | | liquid (at STP) | solid (at STP) melting point | -41.6 °C | | 0 °C | 66 °C boiling point | 83 °C | | 99.9839 °C | density | 1.5129 g/cm^3 | | 1 g/cm^3 | 1.8 g/cm^3 solubility in water | miscible | | | soluble surface tension | | | 0.0728 N/m | dynamic viscosity | 7.6×10^-4 Pa s (at 25 °C) | | 8.9×10^-4 Pa s (at 25 °C) | odor | | | odorless |
| nitric acid | Cr(OH)3 | water | chromium nitrate molar mass | 63.012 g/mol | 103.02 g/mol | 18.015 g/mol | 238.01 g/mol phase | liquid (at STP) | | liquid (at STP) | solid (at STP) melting point | -41.6 °C | | 0 °C | 66 °C boiling point | 83 °C | | 99.9839 °C | density | 1.5129 g/cm^3 | | 1 g/cm^3 | 1.8 g/cm^3 solubility in water | miscible | | | soluble surface tension | | | 0.0728 N/m | dynamic viscosity | 7.6×10^-4 Pa s (at 25 °C) | | 8.9×10^-4 Pa s (at 25 °C) | odor | | | odorless |

Units

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