RT @Chem_BoltonSch: The Landolt (iodine) Clock reaction always has a ‘wow’ factor the first time pupils see this change! https://t.co/e0ijb…
RT @Chem_BoltonSch: The Landolt (iodine) Clock reaction always has a ‘wow’ factor the first time pupils see this change! https://t.co/e0ijb…