Write net equations for each of the reactions below. Use appropriate ionic and molecular formulas an — Chemical Reactions / Descriptive Chemistry Chemistry Question
Problem Context
Write net equations for each of the reactions 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.
A strip of copper metal is heated strongly with concentrated sulfuric acid.
Model Answer
Cu(s) + H2SO4(l) CuSO4(s) + SO2(g) + H2O(l)
(Cu 2+ + SO4 2- is OK in lieu of CuSO4; H3O+ + HSO4– is OK in lieu of H2O)
Solid dinitrogen pentoxide is added to water.
Model Answer
N2O5(s) + H2O(l) H3O+(aq) + NO3–(aq)
Lead(II) carbonate is added to hydrobromic acid.
Model Answer
PbCO3(s) + H3O+(aq) + Br–(aq) PbBr2(s) + CO2(g) + H2O(l)
Freshly precipitated manganese(IV) oxide is added to a solution of hydrogen peroxide.
Model Answer
H2O2(aq) H2O(l) + O2(g) [MnO2(s) catalyzes the reaction]
Chlorine is combined with toluene (methylbenzene) in the presence of ultraviolet light.
Model Answer
+ HCl
Tritium (3H) undergoes radioactive decay.
Model Answer
3 H 3 He +