To check how the rate of transpiration is affected by a change in the PH of the soil/water.

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Aim

To check how the rate of transpiration is affected by a change in the PH of the soil/water.

Apparatus

1.) Hydrilla plant

2.) Test tubes

3.) Paraffin wax

4.) Beaker

5.) NaOH pellets

6.) HCl

7.) PH Paper

8.) Distilled water

9.) Stirrer

10.) Scissors

Procedure

  1. Prepare NaOH solution. Put a few pellets of NaOH in a beaker containing distilled water and stir until the pellets dissolve. This is the dil.NaOH which has a PH of 14. This is checked using the PH paper.
  2. Prepare dil. HCl. Take a beaker containing distilled water and pour 1-2 drops of HCl into it and stir. This gives dil.HCl which when checked with the PH paper gives PH value 1.
  3. Take 5 test tubes labeled a, b, c, d and e.
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  1.  This is the control. Take 10ml of distilled water. Pour a drop of paraffin wax into the test tube as this will prevent the water from evaporating in the sunlight.
  2. Pour 10ml of the dil.NaOH into this test tube followed by a drop of paraffin wax.
  3. Pour 10ml of the dil.HCl into this test tube followed by a drop of paraffin.
  4. Take 10ml of tap water and pour into this test tube. The PH of the tap water is taken to be 5.5 as seen using the PH paper.
  5. Take 10ml of distilled water and pour into this ...

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