10Science-Acid And Bases

Year 10 Acids and Bases

First reactions

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 silver, solid and flexible piece of metal.

2. The magnesium burned with a white bright light that can be harmful to the eyes if directly looked at.

3. After it burned it turned into a white powder that had deformed from the metal itself.

The word equation is: Mg + O2 -----> MgO

The balanced chemical equation is: Mg + O2 -----> MgO2

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 a dark grey colour which was quite prickly to the touch.

2. The sulphur was a yellow, lumpy powder which had a texture of flour.

3, When we heated the tube A glow began at the bottom of the tube and it slowly moved up the tube.

The compound mixed together and it created a substance that was called Iron Sulfide

4. After the reaction the Iron Sulfide had a black-solid look to it and looked partially like a hardened piece of chalk.

The word equation for the reaction is: Fe + S ----> FeS

The balanced chemical equation is: Fe + S ----> FeS