Surface area vs Rate of Reaction

The first 200 words of this essay...

The Effect of the Particle Size on the Rate of Reaction

CaCO3 (s) + 2HCl(aq) --> H2O (l) + CO2 (g) + CaCl(aq)

Variables:

Variable

Methods of Measurement

Independent

Size and Surface area of the CaCO3 particle; in chip of approximately 3x3x3 mm in size or in powder form.

Pre-measured. Materials are given.

Dependent

Volume of gas produced in 3 minutes measured by the graduated glass collecting tube

Using a graduated glass collecting tube. The gas produced will push the water out of the tube and the volume of gas can be read on the tube

Controlled Variables:

Variables

Why it must be controlled? How could it impact the results?

How it will be controlled

Condition of where the CaCO3 and HCl are kept

Different conditions of the CaCO3 will result in different inaccurate measurement when the experiment is carry out, some CaCO3 might have been kept at different temperature, which would alter the amount of energy they have, thus changing their collision potential with HCl molecules

Both the powder and the chip CaCO3 and HCl solution must be kept in the