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.
Water is added to magnesium nitride.
Model Answer
Mg3N2 + H2O → Mg(OH)2 + NH3
Excess carbon dioxide is bubbled through a solution of calcium hydroxide.
Model Answer
CO2 + OH– → HCO3 –
Acidic solutions of potassium dichromate and iron(II) chloride are mixed.
Model Answer
Cr2O7 2– + Fe2+ + H+ → Cr3+ + Fe3+ + H2O
Solutions of lead acetate and sulfuric acid are mixed.
Model Answer
Pb2+ + C2H3O2 – + H+ + SO4 2– → PbSO4 + HC2H3O2
Excess concentrated sodium hydroxide is added to a solution of zinc nitrate.
Model Answer
Zn2+ + OH– → Zn(OH)4 2–
Fluorine-18 undergoes positron emission.
Model Answer
18 9 F → 18 8 O + 0 +1 β