2. Methods

2. Methods 

2.1 Equipment List 

Figure 1- Cups used to contain the 150ml of water which will contain salt and the water hyacinth 












Figure 2- 12 Water hyacinths which will be used to test on its ability to absorb salt 







 Figure 3- Salinity sensors are used to test the concentration of salt present in the water after 24 hours 









4) Salt (NaCl) is present in all 12 set-ups just that the amount varies. 






2.2 Diagrams of experimental setup   
















Figure 1: Experimental setup used to conduct the experiment.

2.3 Procedures


1)Divide the salt accordingly for each set-up

2)Start growing of the 6 water hyacinth and in 6 different salt concentration, check back on plant every 24 hour and record observations of plants and record it down

3) Measure the concentration of salt present everyday and continue to observe for another 6 days 

4) Repeat experiment twice to ensure that the results are reliable and consistent.

5) Tabulate the results.`






6) Plot the graph with reference to the results collected 






2.4 Risk Assessment and Management  

  1. As the water may cause rashes or allergies when in contact with human skin, students must wear gloves when carrying out the experiment, students must not eat or drink during the experiment and Students must wash their hands before and after experimentation. 

b) As we may accidentally spill water on the floor causing people         to sleep and fall, students must wipe any wet areas that they make immediately and they should also walk slowly near the area

c) As water may be spilled on the wires of the data loggers causing malfunction, students must wipe any wet areas that they make immediately and they must also be careful around data-loger


d) As the experiment involves glassware, there is a risk of breakage and cutting of the hands. So we should wear gloves when carrying out the experiment. In case of breakage, the cut to the hands will be minimised. 











2.5 Data Analysis

1)Procedures undertook to analyze the data/results

2) Measure the salinity of each cup

3) calculate the average of both experiment of each cup

4) If the plants are dead take note of the day that they die

5) Present the data on the graph while stating the date that each plants die.


6) Plot a graph for the ppt of each cup.

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