Chemistry reactions Essay

Submitted By pennyfields22

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Objective:
To identify types of reactions and then choose the appropriate materials to perform those reactions while obtaining qualitative and quantitative data.
Decomposition:
Hypothesis
We believe that sodium bicarbonate will decompose when heated in a crucible.
Materials
Crucible (start weight – 10.37g)
Crucible tongs
Bunsen burner
1g Sodium bicarbonate (start weight – 11.37g)
Clay triangle
Observations:
The crucible slowly became red hot as we began to heat it. We also noticed that the sodium bicarbonate began to turn yellow and also began to shrink as time passed. The crucible
After the final weigh in, the crucible with the sodium bicarbonate weighed 11.05g (original weight: 11.37g). The sodium bicarbonate decomposed .32g and transformed into carbon dioxide, water vapor, and sodium carbonate.
Single Replacement:
Materials
1g zinc, 13 drops Hydrochloric acid, well plate
Hypothesis
We believe that when a metal meets an acid it will bubble due to the hydrogen gas being released.
Observations
Little bubbling halfway through and pieces of metal turned a black-ish color.
Zn + 2HCl --> ZnCl2 + H2
Procedure
Gather a gram of zinc and a drop of hydrochloric acid
Place the zinc into a well plate
Place 13 drops of hydrochloric acid into well plate
Record observations
Double Replacement
Materials
potassium iodine lead nitrate
Dropper
test tube
Procedure
1)obtain a test tube 2)Add 15 drops of 0.1M lead (II) nitrate to a test tube. 3) Add

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