2.3 ActivitiesRemember1. A precipitate is a solid which forms when two solutions with dissolved ions come into contact, and the ions join together to form a solid which is insolubleThink1. CuSO4 + H2O => Cu + SO42. A) InsolubleB) InsolubleC) SolubleD) Insoluble3. A) InsolubleB) SolubleC) InsolubleD) Insoluble