In this post, you will find NCERT Science Class 9 Chapter 2 Activity solutions. In Class 9 science chapter 2 Is Matter Around Us Pure consists of NCERT Activity 2.3 Class 9 Science Explanation with a conclusion.
Activity 2.3 NCERT Class9 Science Is Matter Around Us Pure
You are
suggested to study NCERT activity 2.3 class 9 science Is matter around us pure
explanation with a conclusion so that you can attempt questions based on the
activity 2.3 class 9 science. Activity 2.3 class 10 science will be very useful
for you.
Activity
2.3 Class 9 Science
·
Take approximately 50mL of water each in two separate beakers.
·
Add salt in one beaker and sugar or barium chloride in the second beaker
with continuous stirring.
·
When no more solute can be dissolved, heat the contents of the beaker to
raise the temperature by about 5℃.
·
Start
adding solute again.
Observation
Activity 2.3 Class 9 Science
We can
observe that the amounts of salt, sugar, and barium chloride that can be
dissolved in 50 mL of water are different. When we keep adding these solutes continuously,
at a certain point no more solute gets dissolved in a solvent. This is called saturation
point.
At this saturation
point, no more solute gets dissolved.
When the
contents of the beaker are heated, then the solubility increases because the
voids of solvents increase and more solute get dissolved.
Conclusion
Activity 2.3 Class 9 Science
This
activity shows that different substances have different solubilities in a given
solvent at the same temperature and it increases at higher temperatures.
Solubility – The concentration of a solute in a saturated solution at a definite
temperature is called the solubility of that solute in that particular solvent.
Or
Solubility
is defined as the maximum amount of solute in grams which can be dissolved in
100 grams of the solvent.
Facts you should know –
1.
Solubility of a substance generally increases with an increase in temperature.
2. Different substances have different solubilities in different solvents.
3. Solubility of solute in the solution decrease on cooling.
4. The solubility of gases in liquids increases by
decreasing the temperature.
5. The solubility of gases in liquids increases by
increasing the pressure.
Related Topics for you
1. Next Activity - Activity 2.4 Class 9 Science
2. Previous Activity- Activity 2.2 Class 9 Science
3. Solutions of Chapter 2 Is Matter Around Us Pure
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