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).
It is tempting to think of intrinsic and extrinsic motivation as two ends of a continuum such that the higher the intrinsic motivation, the lower the extrinsic motivation; however, there is no automatic relation between intrinsic and extrinsic motivation (Lepper, Corpus, & Iyengar, 2005).