Chemical Reactions

Wednesday, August 2, 2017
Our first Year 10 Chemical Reactions
1. Magnesium reacting with oxygen:

Method: We held a strip of magnesium metal in the hottest part of a bunsen burner flame till it caught fire. We didn't look directly at the reaction because (safety reason)
Observations:
1. The magnesium metal was a shiny, grey and malleable.
2. The magnesium burned with a bright white light.
3. After it burned it turned into a greyish white ash.

Magnesium metals before burning

During burning

After it burned

The word equation is: Magnesium + Oxygen -----> Magnesium Oxide

The balanced chemical equation is: 2 Mg + O₂ ----->2 MgO



2. Iron filings reacting with sulphur:

Method: We mixed equal amounts of iron filings and sulphur then used a magnet wrapped in paper to separate them. We mixed them again and added the mixture to a test tube and heated strongly.
Observations:
1. The iron filings were dark gray almost balck.
2. The sulphur was light yellow.
3, When we heated the tube it burned with a bright red at the bottom.

The word equation for the reaction is:

The balanced chemical equation is: