Class 12th "Solutions" Chapter 02

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SOLUTIONS OF SOLIDS IN LIQUIDS : 

•  Saturated Solutions :  A solution that contains maximum amount of a solute in a given solvent at room temperature. No more solute can dissolve in it. It is a dynamic equilibrium between the undissolved and dissolved solute this is called saturated solution. 
( वह विलयन जिसमें किसी निश्चित ताप पर और अधिक विलेय को घोलना असंभव हो।) 

•  Dissolution :  जब एक solid को liquid में dissolve किया जाता है तो molecular vebrations solute molecules को solution मे enter करने के लिए बाध्य करते हैं। 

•  Precipitation : जैसे जैसे liquid state में solute molecules के concentration में बढ़ोतरी होती जाती है solute molecules solid state मे वापस आना शुरू कर देते हैं। 

•  Unsaturated Solutions :   A solution that is capable of dissolving more solute at a given temperature that it already contains it is known as unsaturated solutions. 
        
•  Supersaturated Solutions :  A solution that contains more dissolved substances that a saturated solution is called supersaturated solution. 

Solubility :  Saturation defines the solubility of solute. 
"Solubility is the maximum amount of solute that can be dissolved in a given solvent."



Difference between saturated, unsaturated and supersaturated solutions : 

Practice Questions : 

1. What do you understand by supersaturated solutions. 

2. What is difference between saturated solution and unsaturated solutions. 

3. Write down the examples of saturated, supersaturated, unsaturated solutions. 



                        Thank You ! 


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Class 12th "Solution" Chapter no. 02

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Molarity : It is a solution which is the number of moles of the solute present in per liter of solution.  (प्रति लीटर विलयन में घुलित विलेय पदार्थ के मोलों की संख्या को विलयन की मोलरता कहते हैं)।  यह किसी निश्चित ताप पर ही हो सकता है।  •  It is denoted by 'M'. Formula :   •    M = (number of moles of solute/volume of solution in liter)                          Or                     M = n/v Unit : mol/liter or mol/L       Formality : It is used to solve the concentration of ionic compounds solutions. Denoted by 'F'. We could use  gram formula mass for ionic compounds. Because they have no discrete molecules e.g. molecular mass word is not valid for that kind of compounds.  "किसी निश्चित ताप पर प्रति लीटर विलयन में घुलित आयनिक पदार्थ के ग्राम सूत्र द्रव्यमान की संख्या विलयन की उस ताप पर फॉर्मलता कहलाती है।" (Gram ...
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