3. The mass of a hydrated compound was found to be 1.483 g. After heating for 2

Question

3. The mass of a hydrated compound was found to be 1.483 g. After heating for 2 minutes, the hydrate was allowed to cool for 20 minutes in open air. Its mass was then found to be 1.482g. List two procedural steps that were incorrectly performed. Determine the formula for the hydrate of cobalt (II) acetate from the following data. Mass of crucible and lid. Mass of crucible, lid, and hydrate.. Mass of crucible, lid, and anhydroos sat...29.677 Mass of crucible, lid, and anhydrous salt (2nd.)..29.673 g 4. ...28.945 g .29.986 g

Explanation / Answer

Ans 3 :

1) The first thing , that the heating is not done for any fixed amount of time such as 2 minutes , but it should be perfomed till the time all of the water molecules have been lost from the compound , and the mass of the compound becomes constant.

2) Secondly after heating , the compound was left in open air for 20 minutes. The open air contains moisture too. So the compound will again absorb all the moisture and hence will lead to incorrect calculations.

Related Questions

Navigate

• Browse (All)
• Browse 3
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.