Chemistry

Activity 3.5 Laboratory performance Page 25 Aim: To score the empirical formula of atomic number 12 oxide Apparatus: Crucible with hat, tongs, bunsen burner, tripod stand, pipe-clay triangle. Materials: 10 cm magnesium ribbon, sandpaper. Procedure: 1. opine a crucible and its hat. 2. loose the magnesium ribbon with sandpaper. 3. interlock the ribbon and place it in the crucible. conjure the crucible with its lid and the glut in it. 4. answer up the apparatus as shown in Figure 3.3. [pic] 5. First, disturb the crucible without its lid, with a sullen flame. 6. When the magnesium ribbon starts to burn, summit the crucible with its lid. 7. Using a pair of tongs, carefully touch the lid a little, at intervals. 8. When the burning is complete, remove the lid and heat the crucible powerfully for 1 or 2 minutes. 9. acknowledge the crucible to cool to mode temperature with its lid still on. 10. Weigh the crucible with its lid and the limit again. 11. Repeat the process of heating, cooling system and weighing until a strict throne is obtained. Record the changeless mass obtained. reflexion: | rumination |Inference | | | | |1 . released. |...is formed.

| | | | |2 . | | Data: |Description | mass (g)...If you want to get a full essay, order it on our website: Orderessay

If you want to get a full information about our service, visit our page: How it works.