When we dissolved 20g nacl in 100ml water on temperature of 100 degree the quantity of nacl is not much in 100ml we give solution saturated

Testing the Saturation of Sodium Chloride Solution

To determine whether a given solution of sodium chloride is saturated or unsaturated at a given temperature, you can conduct a simple experiment using the following steps:

Materials Required:
- Sodium chloride (NaCl)
- Distilled water
- Beaker
- Stirring rod
- Thermometer
- Filter paper
- Evaporating dish

Procedure:

1. Prepare the Sodium Chloride Solution:
- Measure 20g of sodium chloride using a balance.
- Add the measured sodium chloride to a beaker.
- Add 100ml of distilled water to the beaker containing the sodium chloride.
- Stir the mixture using a stirring rod until all the sodium chloride has dissolved.

2. Temperature Control:
- Measure and record the temperature of the solution using a thermometer.
- Make sure to maintain a constant temperature throughout the experiment.

3. Test for Saturation:
- Take a small amount of the prepared solution and place it on a filter paper.
- Allow the filter paper to air dry.
- Observe the filter paper for any signs of crystallization or solid residue formation.

Interpretation of Results:

- If the filter paper shows no signs of crystallization or solid residue, it indicates that the solution is saturated. All the sodium chloride has dissolved in the water at the given temperature.
- If the filter paper shows signs of crystallization or solid residue formation, it suggests that the solution is unsaturated. The excess sodium chloride has precipitated out of the solution due to the inability of the water to dissolve all of it at the given temperature.

Additional Considerations:

- If you want to confirm the saturation level of the solution, you can perform further tests.
- You can evaporate a small amount of the solution in an evaporating dish and observe whether any additional sodium chloride crystals form upon cooling. If crystals do form, it indicates that the solution was unsaturated and more sodium chloride could be dissolved.
- Repeat the experiment at different temperatures to investigate the solubility of sodium chloride at different conditions.

Remember to handle sodium chloride with care as it can be harmful if ingested or comes into contact with eyes or skin.