1. The problem statement, all variables and given/known data A solution of a trivalent metal ion is electrolysed by a current of 5.0A for 10 minutes during which time 1.18g of metal was plated out. The identity of the metal is: A cobalt B chromium C indium D gallium E bismuth Relative atomic masses: 1 faraday = 96,486 coulombs. 2. Relevant equations current*time=coulombs coulombs/96486=faraday 1 faraday = 1 mol of electrons 3. The attempt at a solution 5.0*10*60=3000 coulombs 3000/96486=0.031092 mol of electron Since trivalent metal ion, mol of metal = 0.031092/3 = 0.010364 mols Trial and error by dividing 1.18 by molar mass shows indium is closest. 1.18/114.82 = 0.1028. Is this the correct answer? Cheers!