Types of hemical reactions - Practical Report-(Refer to word document for subscripts,tables and correct characters.)

Essay by nick__whoHigh School, 11th gradeA-, June 2004

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Types Of Chemical Reactions

Aim: To investigate, discuss and identify several different types of chemical reactions through a series of tests and observations.

Decomposition of a carbonate by heating

Apparatus:

Spatula

Bunsen

Test tube (x2)

Copper (II) carbonate

Stopper and delivery tube

Limewater

Procedure:

1. Place a spatular of Copper (II) carbonate (CuCO2) in a test tube.

2. Fit with stopper and delivery tube leading into another test tube, filled with limewater.

3. Heat the test tube containing the Copper (II) carbonate and observe any changes that take place to it or the limewater.

Results/observations: As the light blue Copper (II) carbonate heated, It turned black and created a gas which bubbled through the limewater leaving a milky white precipitate.

Discussion: When the Copper (II) carbonate heated, enough energy was present to start a reaction in which it reacted with the surrounding oxygen in which the Copper (II) carbonate decomposed:

2CuCO2 + O2 2CO2 + 2CuO

Copper (II) carbonate + Oxygen Carbon dioxide + Copper oxide

The Carbon dioxide then travelled through the delivery tube and through the limewater:

CO2 + Ca(OH) 2 CaCO3 + H2O

Carbon dioxide + Limewater (Calcium hydroxide) Calcium carbonate + Water

This reaction leaves us with the calcium carbonate precipitate and indication that Carbon dioxide was the gas that was released through the first reaction.

From this reaction it is possible to determine that a reaction between a carbonate and oxygen (burning) results in carbon dioxide and a metal oxide.

Metal(X) Carbonate + Oxygen (and Heat) Carbon Dioxide + Metal(X) Oxide

Decomposition of a carbonate with an acid

Apparatus:

Spatular

Calcium carbonate

2mol L-1 Hydrochloric acid

Test tube (x2)

Limewater

Procedure:

1. Place a spatular of calcium carbonate into a test tube and add 2-3 cm of hydrochloric acid.

2. Fit the first test tube...