Lesson 3: Precipitation Reactions. A precipitation reaction is a reaction in which soluble ions in separate solutions are mixed together to form an insoluble compound that settles out of solution as a solid.That insoluble compound is called a precipitate.Solubility Rules for Ionic Compounds.esson 3: Precipitation Reactions. A precipitation reaction is a reaction in which soluble ions in separate solutions are mixed together to form an insoluble compound that settles out of solution as a solid. That insoluble compound is called a precipitate. Solubility Rules for Ionic Compounds.
The finding that extrinsic rewards can undermine intrinsic motivation has been highly controversial since it first appeared (Deci, 1971).
enthusiasm for what they are doing and in turn can help them develop an intrinsic motivation for. doing things that are pleasurable and challenging to them (Kohn, 1993, p. 599). The research presented has shown that rewards and ineffective praise have a negative effect. on student intrinsic motivation. Here is a summary of the four components of intrinsic motivation. (Chen and Yeh, 2009, p. 599) compared to Kohnâs research from 2001 and 1993.