Question

activity to study the demonstrate the amount of water that is imbibed by raisins
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Answer 1

Answer:

read the book thoroughly bro

Answer 2

The activity is explained below:

Explanation:

First of all, we need to know what imbibition is.

• It is the process in which water adsorption takes place by substances without the formation of a solution.

• For example: when a seed is immersed in water, it swells due to imbibition. This swelling up produces an impermanent increase in the volume of the cell and does not need energy as materials are transferred passively.

• Raisins swell in size because of the imbibition of water. The amount of water adsorbed can be obtained by calculating the difference in the mass of the dry raisins and the swollen raisins.

We also need to know, what are imbibants and adsorbents?

• They are the materials that imbibe/adsorb water. For example, Starch is an imbibant. And the adsorbent is the fluid/ solution that is imbibed/adsorbed.

Why does Imbibition take place?

• Imbibition chiefly occurs due to the presence of hydrophilic and lyophilic colloids. Water is imbibed through the sub-microscopic capillaries that are situated on the surface of a material.

• The imbibition of water lasts until a dynamic equilibrium is reached, which causes a rise in the imbibant’s volume causing imbibitional pressure of a massive extent.

What is the significance of Imbibition?

1. Germination of seed is initiated by imbibition.
2. The force produced by imbibition is essential for the cohesion of water to the components of xylem.
3. Preservation of water by fruits takes place due to imbibition.
4. Ripening of ovules into seeds happens due to imbibition, as it triggers water transfer to the ovules.

Materials Required  for the activity:

• Spatula

• Beaker

• Petri dish

• Distilled water

• Blotting paper

• 25-30 raisins with their stalks intact

• Electronic balance

Procedure:

1. Take a clean and dried beaker and pour distilled water into it.
2. Take close to 20 fresh, clean, and dried raisins with their stalks.
3. Weigh these selected raisins on an electronic balance.
4. Note the measurement.
5. Add the weighed raisins into the beaker containing distilled water.
6. Leave the raisins uninterrupted and let it soak in water for about 2 to 3 hours.
7. Take a clean, moisture-free petri dish and spread the blotting paper over it.
8. Now carefully take out the soaked raisins into the petri dish with the help of a spatula.
9. Lightly pat dry the raisins.
10. Now again weigh these soaked raisins on an electronic balance.
11. Note the measurement.
12. Now, calculate the difference between the two readings.

Observations :

Weight of dry raisins x_________ gm

Weight of swollen raisins y ___________ gm

Calculations :

Amount of water absorbed by the raisins = (y – x) gm

Percentage of water absorbed by the raisins = (x-y)/x