Question

In a solution of salt and water, no more salt can be dissolved. If we want to add more salt ,it needs to be: *

1 point

Shaked well

Filtered

Alum has to be added

Heated

plz answer fast and correctly plz​

Answer 1

Collect samples of sugar, salt, chalk powder and sand. Take four beakers. Fill each one of them about two-third with water. Add a teaspoonful of sugar to the first beaker, salt to the second, chalk powder to the third and sand to the fourth. Stir the contents of each beaker with a spoon/stirrer. Wait for a few minutes and observe what happens to the substances added to the water.

Note down your observations in the following table.

            Table: Mixing different solid materials in water

S. No. Substance Disappears in water / does not disappear

 1. Sugar Disappears completely in water

 2. Salt Disappears completely in water

 3. Chalk powder Does not disappear in water

 4. Sand Does not disappear in water

Inference: (i) Sugar and salt are soluble in water.  

                (ii) Chalk powder and sand are insoluble in water.

Answer 2

In a solution of salt and water, no more salt can be dissolved. If we want to add more salt ,it needs to be:

Shaked well

Filtered

Alum has to be added

Heated

Heated ,

when no more solute can be added in a given solution we can call it as a saturated solution. To add more solute we can just simply increase the temperature. Just imagine that when we dissolve sugar in cold tea it takes more time to dissolve as compared to hot tea.