Explain How Can Different Mass Of Salt Affect The Mass Of Transmitted Light

Research Question: How can different masses of salt affect the percentage of transmitted light?

Variables –

Independent –

• Mass of salt, the salt added into the distilled water in grams (0.1, 0.5, 0.75, 1, 1.5)

Dependent –

• Percentage of transmitted light through the solution using 5 different mass of salt and a constant availability of 2g of sugar as source of food. (there are 5 trails for each conical flask representing 5 different salt masses)

Controlled –

What is being Controlled? How will it be controlled? Why will it be controlled?
3g of yeast added to 5 different conical flasks Measuring the mass of yeast using the balance. With having a fluctuation in the mass of yeast indicates different population numbers, this will
Measuring the mass of sugar using the scale. It is necessary to add the same mass of sugar in the conical flask to provide the yeast with food, this is because when adding the salt with the yeast without any source of food, the yeasts will not be able to function or do respiration. (yeasts are organic and would not cope with high concentration atmosphere)
Temperature Room temperature; avoid placing conical flask beside windows. It will eventually influence the reliability of the lab, since increase in temperature will also increase the rate of respiration until a certain optimum temperature.
Same Colorimeter device Using the same colorimeter device throughout the experiment. Different colorimeters Collaborates differently which might outcome in functions or changes in percentage
Using the same cuvette throughout the experiment. Make sure to rinse the cuvette after use, in order to use it again. Through using the same cuvette it will increase the reliability of the lab since some cuvettes are “hazier” than other which will affect the intensity of
Based on the data provided above, different masses of salt does affect the population of yeasts, in other words, increasing the mass of salt in the solution kills yeast cells resulting in a decrease in yeast population, this is examined based on the percentage of transmitted light through a solution. To support my point the solution with only 0.1g of salt has an average of 2.6% of transmitted light, indicating that even though the population of yeast had been affected by an external factor as salt it managed to recover however not to its initial density. The percentage of light being transmitted tend to increase further down the table, for instance comparing the lowest concentrated solution (0.1g) with only 2.6% and the highest (1.5g) with 5.4%, its clear that the light being transmitted is increasing as a result of dead yeast. When relating the results to real life situations, we could see how human populations may be influenced by disturbances, as diseases. Yeast populations help conserve fragile ecosystems. Relating this to the results above its clear that whenever the mass of salt increases the population tend to decrease, however when th mass of salt is low, yeasts were able to recover. This shows the ability of yeast population in avoiding destructions such as being exposed to external factors as salt, which damages and kill yeast cells. The results