Chemistry

Activity 3.5 Laboratory work Page 25 purport: To match the empirical formula of magnesium oxide Apparatus: melting pot with hat, tongs, bunsen burner, tripod stand, pipe-clay triangle. Materials: 10 cm magnesium thenar, sandpaper. cognitive operation: 1. consider a melting pot and its lid. 2. Clean the magnesium ribbon with sandpaper. 3. intertwine the ribbon and place it in the crucible. Weigh the crucible with its lid and the glut in it. 4. Set up the utensil as shown in Figure 3.3. [pic] 5. First, heat the crucible without its lid, with a toilsome flame. 6. When the magnesium ribbon starts to burn, cover the crucible with its lid. 7. employ a pair of tongs, care dependabley raise the lid a little, at intervals. 8. When the burning is complete, remove the lid and heat the crucible potently for 1 or 2 minutes. 9. Allow the crucible to cool to room temperature with its lid still on. 10. Weigh the crucible with its lid and the content again. 11. Repeat the process of heating, cooling and measure until a invariable commode is obtained. Record the constant mass obtained. reflexion: |Observation |Inference | | | | |1 . released. |...is formed.

! | | | | |2 . | | info: |Description | mass (g)...If you want to get a full essay, order it on our website: OrderEssay.net

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