For 10 points, name this group of reactions that cycle through a series of colors over time, which are either named for their apparent violation of Le Chatlier's Principle or their ability to keep time.
The first known one of these is the Bray-Liebhafsky reaction, which utilized a mixture of hydrogen peroxide and potassium iodate in dilute sulfuric acid. A modified version of the Bray reaction known as the (*) Briggs-Rauscher equation adds malonic acid and maganase ions to the reaction mixture. Ones using a ceric-cerous system or Ferroin indicator belong in the Belousov-Zhabotinsky family of these reactions. Many of them employ a starch indicator which responds to changing levels of iodine. For 10 points, name this group of reactions that cycle through a series of colors over time, which are either named for their apparent violation of Le Chatlier's Principle or their ability to keep time.
The first known one of these is the Bray-Liebhafsky reaction, which utilized a mixture of hydrogen peroxide and potassium iodate in dilute sulfuric acid.
{Clock} reactions [or {non-equilibrium} reactions; prompt on {chemical oscillators} or {oscillating }{reactions}] (4) [DF]