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Agar Cubes Lab

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Qualitative data :
Observations: The Agar Cubes are brown. They all have different dimensions. They are all made out of the same substance (Agar). Their texture is squishy a bit like jello and/or wax. They are slippery (because of the water). They have dissolved a little bit and they have small parts on the edges missing.

Quantitative data:
Conductivity of 5 trials of agar cube (5.00x5.00x10.00 +/- 0.05cm) Conductivity of Agar Cubes Cut Into Various Sizes, Surface Area to Volume Ratio, Average Conductivity and Standard Deviation of Conductivity

Size of agar cubes
(5.00x5.00x10.00+/- 0.05 cm) Time (+/-1sec) Rate of conductivity uScm
Trial no. 0 30 45 60 120 Conductivity (uScm^-1)
1 11.6 24.6 29 34.6 51.7 0.3502
2 13.3 36.9 45.9 60.1 87.3 0.6222 …show more content…
0 30 45 60 120 Conductivity (uScm^-1)
1 18 47.7 54.9 66 79.5 0.3941
2 39.6 86 82.6 90.4 112.7 0.4234
3 19.4 55.2 63.3 72.6 97.6 0.5267
4 6.3 34.1 42.9 49 65.8 0.4216
5 20.7 38.7 43.5 47.9 61.1 0.2926
Average Conductivity 20 52 57 65 83 Average Conductivity
STDEV Conductivity 12 20 16 17 21 0.4117

Size of Agar cubes (2.5x5.00x5.00+/-0.05cm) Time (+/- 1Sec) Rate of conductivity (+/-uScm^-1)
Trial no. 0 30 45 60 120 Conductivity (uScm^-1)
1 21.3 76.9 58.7 65.5 90.9 0.4796
2 211.4 225.3 230.5 233 242.4 0.2273
3 22 62.4 82.2 84.5 113.8 0.6575
4 9.8 53.3 57.6 63.9 82.8 0.4492
5 17.7 40.8 47.5 55.8 78.6 0.4679
Average Conductivity 56 91 95 1.0x10^2 1.2x10^2 Average Conductivity (uScm^-1)

Size of Agar cubes (2.5*2.5* 5.00 +/- 0.05cm) Time (+/- 1 sec) Rate of Conductivity (0.001uScm^-1)
Trial no. 0 30 45 60 120 Conductivity (uScm^-1)
1 26.6 56.7 19.7 80.7 114.3 0.585
2 27.9 62.1 70.6 78 106.1 0.6815
3 36.6 78.5 93 108.3 167.9 1.02
4 30.5 63.1 74.7 82.9 109.8 0.6107
5 24.4 48 60.7 72 86.7 …show more content…
Concluding Statement: In this experiment agar cubes of various dimensions : ( 5x5x10 cm, 5x5x5 cm, 2.5x5x5 cm, 2.5x2.5x5 cm and 2.5x2.5x2.5 cm) were used in order to conclude that As time increases the average conductivity is also increasing for every cube. The cubes with the SA: VOL ratio 2:4:2 had the highest average conductivity whilst the lowest was 1:1. As the SA: Vol ratio increases the average rate of conductivity increases. Each set of cube was placed in 600 mL of distilled water. Their conductivity was measured for 120 seconds at 5 different trial points.
The results of the experiment allows us to state that the smaller the cube the higher the rate of diffusion, since the cubes were acting as cells for the experiment this is important becase maintaining a certain surface area is necessary for cells in order to be able to effectively transport nutrients and export waste.

Conductivity, depends on both the surface area and the volume of this object. Thanks to the experiment we can now determine that the rate of average conductivity can be increased by increasing the surface area of the Agar

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