Daily Archives: September 25, 2016

Chemistry 11: Types of Reactions – Practice Lab

Experiment #1

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When the piece of magnesium ribbon hit the flame (oxygen) created by the bunsen burner it created a bright light burner just until the magnesium burned into an ashy substance. This was a synthesis reaction and created magnesium oxide!

Experiment #2

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When the butane lighter was turned on it created a blue flame and it also reacted with oxygen to create a combustion reaction!

Experiment #3

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Once the KI crystals were added to the 5.0ml of hydrogen peroxide as a catalyst the substance changed into a bright yellow foam and it exploded slowly to the top of the graduated cylinder. this was a decomposition reaction.

Experiment #4

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The image on the top is what the small coper BB looked like before the few drops of 0.1M Silver nitrate solution was added. The picture at the bottom is what it looked like after 10 min and there was small silver crystals that were forming around the ball. The liquid also turned a bluey colour. This reaction was a single replacement.

Experiment #5

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The first image is what the 0.1M Potassium iodide and 0.1M Lead (II) nitrate look like separately in a spot plate. Then once we added them together (as seen in the second image) they created a bright yellow colour which was also a second replacement reaction!

Experiment #6

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In this one we had to discover which liquid was the acid and which was the base using litmus paper. In the first picture we see that the litmus paper turns blue and in the second it turns red which indicates that one is acidic and the other is a base! We then had to balance the two liquids to find a perfect balance of acid and base which then turned (as seen in the third picture) the litmus paper red and blue (relatively) equally! This was an acid base neutralization!