A block of bromothymol blue agar should be cut into the following sizes using the chopping board, knife and ruler: Fill the beaker with hydrochloric acid and put the 1cm3 agar cube into the beaker, making sure to completely immerse the cube in the acid. Start the stop watch as soon as you put the agar cube into the HCL.
Then calculate the surface area and volume of each agar cube. Try to make sure each agar cube is as accurate as possible.
Then start the stopwatch. Then calculate the percentage. Volume of Agar Cube Conclusion: In conclusion, we tested the Surface Area to Volume ratio in two different ways because we could not decide on which method would be more accurate. As the cell size increases, its volume increases faster than the surface area.
The size of the agar cube played a significant role in this experiment because the larger the cube, the harder it was for the sodium hydroxide to diffuse. When the cells are large, the cell membrane creates a strong barrier against the substance, which makes it difficult for diffusion to take place.
The line of best fit did not pass through the origin because we assumed that the agar and the sodium would be uniformly dense however, they could be heavier.
This then caused the systematic error, which is shown on the y-axis of the graph. One point did not suite the graph because of a random error such as the inaccuracy of the cube.
Many errors occurred during this experiment. The agar cubes were difficult to cut and because they were wobbly, it made it even harder to make them the same size and accurate.
We were not able to make all the cubes have the same length, height and depth because the agar was only a certain depth.
Although three trials were taken for each agar cube, I still believe that the source of error might have been largely affected by this measurement therefore; we used two methods of finding the percentage of present in the agar cube.
We did not make sure that the had a constant temperature so this could have been another factor which affected our experiment. This experiment could be improved by having accurately cut agar cubes as well as another possible way of measuring the absorption of sodium hydroxide.
One potential method could be using a jelly mould in order to make sure that all the cubes are the same size and this would make the experiment more accurate. Some of our data was collected during another time and mould started growing on the agar so possibly the experiment was affected by this.
Choose Type of service.More the surface area to volume ratio, more is the diffusion. Surface area to volume ratio, in simple means the size of surface area to the volume of substance that can pass through it at a particular time.
Amoeba and some bacterias are flat and have large surface area to volume ratio. So the diffusion rate is very high due to large surface area.
The experiment results seen on the graph (trend line) show that the bigger is the surface area to volume ratio, the bigger is the percentage volume of diffusion, so the rate of diffusion of pigment from the agar cube. In conclusion, the potato cube with the highest surface area to volume ratio (the 1x1x1 cube) had the fastest rate of diffusion as it had the largest percentage increase in mass.
While all the other cubes of potato had larger increases in mass at face value compared to the smallest cube, the smallest cube had the largest overall gain in percentage.
The surface area to volume ratio of the agar cubes was investigated by cutting out different volumes agar and then immersing them in sulphuric acid to investigate how the rate of diffusion is affected.
Essay on Diffusion with Surface Area to Volume Ratio Volume of cube: s3 s = 7cm s3 = (7cm x 7cm x 7cm) = cm3 2. Compute the volume of a cuboid (also known as a rectangular prism) The smallest round bottom flask . Diffusion is the passive movement of particles from high concentration to low concentration - Investigating Surface Area to Volume Ratio concerning the rate of Diffusion Essay introduction.
It is a very slow process so therefore the smaller the cell it is more efficient and faster.