an artist has created a special line of decorative iron spoons that she would like to protect from rusting by adding a zinc coating. she plans to use electroplating to add the zinc coating. running an electric current from the iron spoon to the zinc plate causes the iron to become negatively charged and attracts positively charged zinc metal ions from the solution to its surface. the solution replaces its zinc ions from the zinc plate. for the electroplating to work, she needs to make a solution by combining water and a zinc salt. she needs a zinc salt that will fully dissolve in water. when it dissolves, the zinc salt will break apart into positive zinc ions and negative ions. this will allow electricity to flow and zinc ions to move through the solution. help the artist choose the zinc salt that will work best for her project.