Write net equations for each of these reactions. Use appropriate ionic and molecular formulas for th — Descriptive Chemistry Chemistry Question
Problem Context
Write net equations for each of these reactions. Use appropriate ionic and molecular formulas for the reactants and products. 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 reactions. All reactions occur in aqueous solution unless otherwise indicated.
Solid calcium hydrogen carbonate is heated to a very high temperature.
Model Answer
Note: Balanced equations were not required.
Ca(HCO3)2 → CaO + H2O + 2CO2 (partial credit for CaCO3)
Solid potassium sulfite is added to a solution of hydrochloric acid.
Model Answer
K2SO3 + H+ → K+ + H2O + SO2 (partial credit for H2SO3)
Solutions of barium hydroxide and sulfuric acid are mixed.
Model Answer
Ba2+ + OH– + H+ + SO4 2– → H2O + BaSO4
A tin(II) chloride solution is added to an acidic solution of potassium dichromate.
Model Answer
Cr2O7 2– + Sn2+ + H+ → Cr3+ + Sn4+ + H2O (partial credit for SnCl4)
Concentrated hydrochloric acid is added to a solution of sodium hypochlorite.
Model Answer
H+ + Cl– + OCl–→ Cl2 + H2O (partial credit for HClO)
Nitrogen-16 undergoes β– decay.
Model Answer
7 16N → –1 0 + 8 16O