Surface Area to Volume Ratio Simulation Experiment. The comparison between surface area : volume ratio and time taken for agar blocks to decolourise.

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Data Collection

Qualitative Observation

Table 1.0 Observations on before, during and after experiment.

Before experiment

During experiment

After experiment

Agar blocks are dark brown in colour.

Agar blocks slowly start to decolourise after putting in the dilute hydrochloric. The centre of the block is the last to decolourise.

The agar blocks are light yellow.

The smaller blocks appear to decolourise faster than the bigger blocks.

Smallest block decolourise completely first. Biggest block decolourise lasts.

Decolouration is slower as it approaches the centre.

Quantitative Observations

Table 1.1: Surface area, volume, and ratio of surface area to volume of the agar blocks.

Agar block

Surface Area/mm2

Volume/mm3

Ratio

1

600.0

1000.0

0.6 : 1.0

2

400.0

500.0

0.8 : 1.0

3

250.0

250.0

1.0 : 1.0

4

150.0

125.0

1.2 : 1.0

5

100.0

62.5

1.6 : 1.0

* To cut out the blocks of agar, a ruler is used. The uncertainty for a ruler is ±0.5mm.

* Agar block 1