Steps Taken to Carry Out Investigation

1. Record the pH values of the different liquids (dilute hydrochloric acid, dilute sodium hydroxide, distilled water, tap water and toothpaste mixture) in the table under the heading labelled as 'pH of the Liquids'.
2. Pour 200ml of the of the liquids into 5 containers labelled container 1, 2, 3, 4 and 5 respectively. Container 1 is to contain dilute hydrochloric acid, container 2 distilled water, container 3 tap water, container 4 toothpaste mixture and container 5 dilute sodium hydroxide.
3. Fill a large container with water tap water that has been used to grow water hyacinths in previously. Label the large container 'control set-up'.
4. Place 1 water hyacinth into containers 1, 2, 3, 4 and 5.
5. Place 4 water hyacinths into the large container.
6. Record the appearances of the plants, specifically the state of the roots, stem, leaves and plant as a whole in the table under the heading 'Initial Appearance'.
7. Allow the plants to grow and react to the different liquid mediums that they are grown in for three days.
8. At the end of the three days, record the appearances of the plants, specifically the state of the roots, stem, leaves and plant as a whole in the table under the heading 'Final Appearance'.
9. If possible, repeat the experiment in order to ascertain the reliability of the results.