Question

Write a balanced equation for the reaction of hydrogen sulfide with (a) \(\mathrm{Cd}^{2+}\) (b) \(\mathrm{OH}^{-}\) (c) \(\mathrm{O}_{2}(g)\)

Short answer

Question: Write balanced chemical equations for the reaction of hydrogen sulfide (H2S) with (a) Cd2+ ion, (b) OH- ion, and (c) O2 gas. Answer: (a) 2H2S + Cd2+ → CdS + 4H+ (b) H2S + 2OH- → S2- + 2H2O (c) 2H2S + 3O2 → 2SO2 + 2H2O

Step-by-step solution

Write the unbalanced equation

Initially, write down the reactants and products for the reaction. In this case, hydrogen sulfide (H2S) reacts with Cd2+ ion to produce cadmium sulfide (CdS) and hydrogen ions (H+): H2S + Cd2+ → CdS + H+

Balance the equation

Now, balance the atoms in the equation by adjusting the coefficients of reactants and products: 2H2S + Cd2+ → CdS + 4H+ (b) Reaction of hydrogen sulfide with OH-

Write the unbalanced equation

Write the reactants and products for the reaction. In this case, hydrogen sulfide (H2S) reacts with hydroxide ions (OH-) to produce sulfide ions (S2-) and water (H2O): H2S + OH- → S2- + H2O

Balance the equation

Balance the atoms in the equation by adjusting the coefficients of reactants and products: H2S + 2OH- → S2- + 2H2O (c) Reaction of hydrogen sulfide with O2 gas

Write the unbalanced equation

Write the reactants and products for the reaction. In this case, hydrogen sulfide (H2S) reacts with oxygen gas (O2) to produce sulfur dioxide (SO2) and water (H2O): H2S + O2 → SO2 + H2O

Balance the equation

Balance the atoms in the equation by adjusting the coefficients of reactants and products: 2H2S + 3O2 → 2SO2 + 2H2O