Class 12th "Solutions" Chapter 02

-
Composition of Solution/Concentration Units(विलयन का संघटन या सांद्रण इकाइयाँ) :
The solvent that makes up most of solutions whereas a solute is the substance that is dissolved inside the solvent. 
(विलायक की एक निश्चित मात्रा मे घुलित विलेय पदार्थ की मात्रा को विलयन का संघटन या विलयन का सांद्रण कहा जाता है।)These we can describes in many units that is following :

1.  Mass Percentage : A solute units persent in 100g of Solution is known as mass percentage or weight percentage. We denoted it is in mathematical way like  w/w. 
( 100g विलयन में उपस्थित ग्रामों में विलेय की मात्रा को द्रव्यमान प्रतिशत कहा जाता है। ) 
Formula :

  •  mass percentage of solute = (mass of solute/mass of solution)×100 


2.  Volume Percentage : 100 unit volume of solution is mixed with solute unit volume. How many amount are mixed with 100 unit volume of solution this is called volume percentage. It is denoted by v/v.
•  volume is always counted in ml units. 
( 100 इकाई आयतन विलयन में 
विलेय के इकाई आयतनों की संख्या को आयतन प्रतिशत कहते हैं ) 
Formula : 

•  Volume percentage = (volume of solute/volume of solution)×100



Practice Questions : 
1.  What is the molecular mass. 

2.  Calculate the molecular mass of ethyl alcohol, methyl benzene, sodium hypochlorite, Sodium hydroxide. 

3.  10g of succrose mixed with 100g of water. Calculate the mass percentage of succrose in solution. 

4.  5.8×10^-3 g oxygen is soluble in 1 liter of sea water. If sea water density is 1.03 g/cm^3 therefore calculate the concentration of oxygen in ppm(part per million). 


                 
                             Thank You !  

Comments

Post a Comment

Popular posts from this blog

-
Image
  INTERNATIONAL SPACE STATION(ISS) PC - NASA Five space agencies including NASA, JAXA, ROSCOSMOS, CSA, ESA have contributed to the space station assembly. The International Space Station is larger than a six-bedroom house with six sleeping quarters, two bathrooms, a gym, and a 360-degree view bay window. In 24 hours, the space station makes 16 orbits of Earth, traveling through 16 sunrises and sunsets. Peggy Whitson  set the U.S. record for spending the most total time living and working in space at 665 days on Sept. 2, 2017. To mitigate the loss of muscle and bone mass in the human body in microgravity, the astronauts work out at least two hours a day. The solar array wingspan (356 feet, 109 meters) is longer than the world’s largest passenger aircraft, the Airbus A380 (262 feet, 80 meters). pc-NASA The space station is 356 feet (109 meters) end-to-end, one yard shy of the full length of an American football field including the end zones. A spacecraft can arrive at the s...
Read more

Practice

-
Image
        QUESTIONS   Question 1. Give the uses of freon 12, DDT, carbon tetrachloride and iodoform. Question 2. p-Dichlorobenzene has higher m.p. and lower solubility than those of o- and m-isomers. Discuss.
Read more

Class 12th "Solution" Chapter no. 02

-
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 ...
Read more