Please create typed responses that are 4 to 6 sentences in length. Reaction 5: C

Question

Please create typed responses that are 4 to 6 sentences in length.  

Reaction 5: Combustion of Magnesium Ribbon 2 Mg (s) + O2 (g) 2 MgO (s) 1. Gather a 2cm piece of magnesium ribbon and record observations about the appearance. 2. Ignite a Bunsen burning if one isn’t already lit. 3. Hold the magnesium ribbon in the tongs and place it into the flame. The flame should be blue with a small brighter blue cone inside. The tip of the brighter blue cone is very hot and will rapidly ignite the magnesium. Remove the magnesium from the flame as soon as ignited and record observations.

5

Silver, shiny, rough

After burned, large white flame appear and lots of sparks

In Reaction 5, both magnesium and magnesium oxide are solids. Use your observations to come up with two clear indications that a chemical reaction occurred.

5

Silver, shiny, rough

After burned, large white flame appear and lots of sparks

Explanation / Answer

Combustion of magnesiom ribbon is obviously a chemical reaction. A chemical reaction is said to occur when some rearrangement of ionic or molecular structure takes place and some products are formed which have properties different from the reactants.

Magnesium ribbon is a pure elemental form of magnesium. During the reaction, it reacts with atmospheric oxygen ( and not fire ) to produce a powder of magnesium oxide.

This process is rightly termed as a chemical reaction since a lot of heat/energy is produced ( as observed, large white flames and sparks). Also, breakdown and formation of new chemical bonds occur

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