When the Coppock Curve gets down to a very low level and then turns up, it signals an important long term entry point. Coppock was a money manager who wanted to find the really great long term buy signals, and was not so much interested smaller swings.
It is inserted in the apparatus set-up between the reaction container and the gas collection system. It is packed with a solid water absorbing drying agent e.g. anhydrous calcium chloride (not for ammonia), calcium oxide (not acidic gases like sulphur dioxide, carbon dioxide and chlorine), anhydrous sodium sulphate.
1. Bubble the gas through limewater. The most effective way to test for COÂ² is to bubble the gas through lime water, a diluted solution of calcium hydroxide (slaked lime). When you bubble carbon dioxide through the solution, it forms a solid precipitate of calcium carbonate â chalk or limestone.Calcium carbonate is insoluble in water.. Bubble the gas through the limewater. Half-fill a test tube with limewater â then boil it. Use a delivery tube to pipe the contents of the COÂ² sample test tube directly into the boiling limewater. You can use a flexible pipe or a (metal) straw as a delivery tube, if nothing better is around.