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Chemistry: Practical Investigation

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  • Essay length: 1391 words
  • Submitted: 01/05/2009
  • Marked by teacher: (?) Cornelia Bruce
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GCSE Patterns of Behaviour

Teacher essay summary

3 star(s)

This report is fairly well written, supported by some strong scientific theory. Specific strengths and improvements have been suggested throughout.

Marked by teacher Cornelia Bruce 17/04/2013

The first 200 words of this essay...

Chemistry: Practical Investigation

Aim

To see how varying the concentration of hydrochloric acid affects its reaction time with calcium carbonate.

CaCo3 + 2HCl CaCl2 + H2O + CO2

Apparatus

In this experiment I will need:

Hydrochloric acid, calcium carbonate, water, conical flask, a bung with hole for tube, burette, water basin, eye protection, stopwatch.

Background science

"A reaction rate is the speed at which reactants are converted into products in a chemical reaction. The reaction rate is given as the instantaneous rate of change for any reactant or product"1. Collision theory is the theory that atoms or molecules need to collide to react. Most, if not all, reactions also need activation energy for the reaction to occur, also orientation is needed. Factors affecting collision theory are surface area, catalysts, temperature and concentration. Surface area affects the rate of reaction because it increases the frequency of collisions as there is more to collide with, temperature affects the rate of reaction because it both increases the frequency of collisions and the energy in the collisions as it excites the atoms, while concentration affects the rate of reaction because it also increases

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MbT essay summary

This report is fairly well written, supported by some strong scientific theory. Specific strengths and improvements have been suggested throughout.

Marked by teacher Cornelia Bruce 17/04/2013

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