Write balance equation for the reaction : Phosphorus burns in chlorine gas to form phosphorus pentachloride.

In the following situation, a reaction may or may not take place. If it does, write the balanced molecular, total ionic and net ionic equations illustrating the reaction. Assume the reaction takes place in aqueous solutions.

• Some iron nails are placed in ${\mathrm{CuCl}}_2$ solution.

In the following situation, a reaction may or may not take place. If it does, write the balanced molecular, total ionic and net ionic equations illustrating the reaction. Assume the reaction takes place in aqueous solutions.

• Some coins are dropped in hydrochloric acid solution.

In the following situation, a reaction may or may not take place. If it does, write the balanced molecular, total ionic and net ionic equations illustrating the reaction. Assume the reaction takes place in aqueous solutions.

• A copper wire is placed in $\mathrm{Pb}{\left({\mathrm{NO}}_3\right)}_2$ solution.