Write net equations for each of the combinations of reactants below. Use appropriate ionic and molec — Descriptive Chemistry Chemistry Question
Problem Context
Write net equations for each of the combinations of reactants below. Use appropriate ionic and molecular formulas and omit formulas for all ions or molecules that do not take part in a reaction. Write structural formulas for all organic substances. You need not balance the equations. All reactions occur in aqueous solution unless otherwise indicated.
Solid ammonium chloride and solid calcium hydroxide are mixed.
Model Answer
NH4Cl + Ca(OH)2 → CaCl2 + NH3 + H2O
Excess carbon dioxide gas is bubbled into a sodium hydroxide solution.
Model Answer
CO2 + OH– → HCO3–
Sodium sulfite is added to a neutral potassium permanganate solution.
Model Answer
SO32– + MnO4– → SO42– + MnO2
Aqueous hydrofluoric acid is placed on a piece of silica.
Model Answer
HF + SiO2 → SiF4 + H2O
Chlorobenzene is heated with a mixture of concentrated nitric and sulfuric acids.
Model Answer
C6H5Cl + H+ + NO3– → or
Iodine-131 undergoes radioactive decay.
Model Answer
131 53I → 0 -1β + 131 54Xe or 131 53I → 4 2He + 127 51Sb (for half credit)