In addition, the discovery of water of hydration band on 773 Irmintraud meant that there may be major differences in mineralogy within individual type classification and astronomers must be careful in assuming that the C-, D-, and other type classification relate directly to mineralogy.
12.
The molecular formula is typically written as MgO : XSiO 2, where X denotes the average mole ratio of SiO 2 to MgO . The product is hydrated and the formula is sometimes written MgO : XSiO 2 " H 2 O to show the water of hydration.
13.
:I haven't done this lab in school . . . I'm in high school, grade 12, but the colour change you observed changing to white most likely was removing the water of hydration, i . e . making anhydrous cupric sulfate from the pentahydrate.
