Input interpretation
NH_4OH ammonium hydroxide + AgCl silver chloride ⟶ H_2O water + Ag(NH3)2Cl
Balanced equation
Balance the chemical equation algebraically: NH_4OH + AgCl ⟶ H_2O + Ag(NH3)2Cl Add stoichiometric coefficients, c_i, to the reactants and products: c_1 NH_4OH + c_2 AgCl ⟶ c_3 H_2O + c_4 Ag(NH3)2Cl Set the number of atoms in the reactants equal to the number of atoms in the products for H, N, O, Ag and Cl: H: | 5 c_1 = 2 c_3 + 6 c_4 N: | c_1 = 2 c_4 O: | c_1 = c_3 Ag: | c_2 = c_4 Cl: | 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 = 2 c_2 = 1 c_3 = 2 c_4 = 1 Substitute the coefficients into the chemical reaction to obtain the balanced equation: Answer: | | 2 NH_4OH + AgCl ⟶ 2 H_2O + Ag(NH3)2Cl
Structures
+ ⟶ + Ag(NH3)2Cl
Names
ammonium hydroxide + silver chloride ⟶ water + Ag(NH3)2Cl
Equilibrium constant
Construct the equilibrium constant, K, expression for: NH_4OH + AgCl ⟶ H_2O + Ag(NH3)2Cl 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 NH_4OH + AgCl ⟶ 2 H_2O + Ag(NH3)2Cl 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 NH_4OH | 2 | -2 AgCl | 1 | -1 H_2O | 2 | 2 Ag(NH3)2Cl | 1 | 1 Assemble the activity expressions accounting for the state of matter and ν_i: chemical species | c_i | ν_i | activity expression NH_4OH | 2 | -2 | ([NH4OH])^(-2) AgCl | 1 | -1 | ([AgCl])^(-1) H_2O | 2 | 2 | ([H2O])^2 Ag(NH3)2Cl | 1 | 1 | [Ag(NH3)2Cl] 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 = ([NH4OH])^(-2) ([AgCl])^(-1) ([H2O])^2 [Ag(NH3)2Cl] = (([H2O])^2 [Ag(NH3)2Cl])/(([NH4OH])^2 [AgCl])
Rate of reaction
Construct the rate of reaction expression for: NH_4OH + AgCl ⟶ H_2O + Ag(NH3)2Cl 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 NH_4OH + AgCl ⟶ 2 H_2O + Ag(NH3)2Cl 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 NH_4OH | 2 | -2 AgCl | 1 | -1 H_2O | 2 | 2 Ag(NH3)2Cl | 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 NH_4OH | 2 | -2 | -1/2 (Δ[NH4OH])/(Δt) AgCl | 1 | -1 | -(Δ[AgCl])/(Δt) H_2O | 2 | 2 | 1/2 (Δ[H2O])/(Δt) Ag(NH3)2Cl | 1 | 1 | (Δ[Ag(NH3)2Cl])/(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[NH4OH])/(Δt) = -(Δ[AgCl])/(Δt) = 1/2 (Δ[H2O])/(Δt) = (Δ[Ag(NH3)2Cl])/(Δt) (assuming constant volume and no accumulation of intermediates or side products)
Chemical names and formulas
| ammonium hydroxide | silver chloride | water | Ag(NH3)2Cl formula | NH_4OH | AgCl | H_2O | Ag(NH3)2Cl Hill formula | H_5NO | AgCl | H_2O | H6AgClN2 name | ammonium hydroxide | silver chloride | water | IUPAC name | ammonium hydroxide | chlorosilver | water |
Substance properties
| ammonium hydroxide | silver chloride | water | Ag(NH3)2Cl molar mass | 35.046 g/mol | 143.32 g/mol | 18.015 g/mol | 177.38 g/mol phase | aqueous (at STP) | solid (at STP) | liquid (at STP) | melting point | -57.5 °C | 455 °C | 0 °C | boiling point | 36 °C | 1554 °C | 99.9839 °C | density | 0.9 g/cm^3 | 5.56 g/cm^3 | 1 g/cm^3 | solubility in water | very soluble | | | surface tension | | | 0.0728 N/m | dynamic viscosity | | | 8.9×10^-4 Pa s (at 25 °C) | odor | | | odorless |
Units