H2S + HBrO3 = H2O + S + Br2

H_2S (hydrogen sulfide) + HO_3Br (bromic acid) ⟶ H_2O (water) + S (mixed sulfur) + Br_2 (bromine)

Balance the chemical equation algebraically: H_2S + HO_3Br ⟶ H_2O + S + Br_2 Add stoichiometric coefficients, c_i, to the reactants and products: c_1 H_2S + c_2 HO_3Br ⟶ c_3 H_2O + c_4 S + c_5 Br_2 Set the number of atoms in the reactants equal to the number of atoms in the products for H, S, Br and O: H: | 2 c_1 + c_2 = 2 c_3 S: | c_1 = c_4 Br: | c_2 = 2 c_5 O: | 3 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_5 = 1 and solve the system of equations for the remaining coefficients: c_1 = 5 c_2 = 2 c_3 = 6 c_4 = 5 c_5 = 1 Substitute the coefficients into the chemical reaction to obtain the balanced equation: Answer: | | 5 H_2S + 2 HO_3Br ⟶ 6 H_2O + 5 S + Br_2

+ ⟶ + +

hydrogen sulfide + bromic acid ⟶ water + mixed sulfur + bromine

K_c = ([H2O]^6 [S]^5 [Br2])/([H2S]^5 [H1O3Br1]^2)

rate = -1/5 (Δ[H2S])/(Δt) = -1/2 (Δ[H1O3Br1])/(Δt) = 1/6 (Δ[H2O])/(Δt) = 1/5 (Δ[S])/(Δt) = (Δ[Br2])/(Δt) (assuming constant volume and no accumulation of intermediates or side products)

| hydrogen sulfide | bromic acid | water | mixed sulfur | bromine formula | H_2S | HO_3Br | H_2O | S | Br_2 Hill formula | H_2S | BrHO_3 | H_2O | S | Br_2 name | hydrogen sulfide | bromic acid | water | mixed sulfur | bromine IUPAC name | hydrogen sulfide | bromic acid | water | sulfur | molecular bromine

| hydrogen sulfide | bromic acid | water | mixed sulfur | bromine molar mass | 34.08 g/mol | 128.91 g/mol | 18.015 g/mol | 32.06 g/mol | 159.81 g/mol phase | gas (at STP) | | liquid (at STP) | solid (at STP) | liquid (at STP) melting point | -85 °C | | 0 °C | 112.8 °C | -7.2 °C boiling point | -60 °C | | 99.9839 °C | 444.7 °C | 58.8 °C density | 0.001393 g/cm^3 (at 25 °C) | | 1 g/cm^3 | 2.07 g/cm^3 | 3.119 g/cm^3 solubility in water | | | | | insoluble surface tension | | | 0.0728 N/m | | 0.0409 N/m dynamic viscosity | 1.239×10^-5 Pa s (at 25 °C) | | 8.9×10^-4 Pa s (at 25 °C) | | 9.44×10^-4 Pa s (at 25 °C) odor | | | odorless | |