Sofia has been given the task of identifying a metal. She knows that the metal is one of zinc, iron, copper or silver. She has been given a number of small pieces of the metal and also some solutions of copper sulfate, zinc sulfate, iron sulfate and silver nitrate.
a Explain how she could use these solutions to identify the metal.
b Explain how you could use displacement reactions to distinguish between iron and zinc . you may use any solution you choose .​