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Calcium Carbonate and Hydrochloric Acid

Essay by   •  July 31, 2011  •  Lab Report  •  448 Words (2 Pages)  •  2,774 Views

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Calcium carbonate and hydrochloric acid

Aim: the aim of the experiment was to test whether or not dividing a substance would speed up its rate or reaction with another substance

Hypothesis: my hypothesis was that the powdered form of calcium carbonate would react faster because it has looser bonds between each particle making it easier for the hydrochloric acid to cover more area of the calcium carbonate

Equipment:

Test tubes

Test tube holder

Beaker

Solid and powdered form of calcium carbonate

Hydrochloric acid

Lab coat

Safety glasses

Procedure: Place a piece of powdered calcium carbonate in one test tube , a half crushed piece in the second and a solid piece in the third. Pour hydrochloric acid into each test tubes noting after each one how much of a physical reaction had occurred.

Safety/risks: safety glasses and a lab coat were necessary because hydrochloric acid is corrosive and can cause damage to the eyes and skin.

Results: the results were that the more divided the piece of calcium carbonate was the faster and greater it reacted. The solid form made a small reaction the half crushed piece made it a quarter of the way up the test tube and the powdered form made it three quarters of the way up.

Conclusion:

The experiment supported my hypothesis that the more divided a substance is, the greater the chance of their being a collision between the atoms and ions. Because the atoms of the calcium carbonate were bonded so tightly the reactant couldn't reach the atoms on the inside meaning a smaller and slower reaction. When the calcium carbonate was separated the hydrochloric acid could reach the atoms on the inside causing a larger and faster reaction.

Rate of reaction, temperature

Aim: the aim of this experiment was find out how increasing temperature can change the rate of reaction.

Hypothesis: My hypothesis was that changing the temperature would make the liquid go cloudy faster. This would happen because heating particles makes them move faster, causing more collisions therefore creating more reactions.

Equipment:

10cm measuring cylinder

Two boiling tubes

250 cm beaker

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