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कर्नाटक बोर्ड पी.यू.सी.पीयूसी विज्ञान 2nd PUC Class 12

Define Mole fraction. - Chemistry

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प्रश्न

Define Mole fraction.

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उत्तर

The mole fraction of a particular component in a solution is the ratio of the number of moles of that component to the total number of moles of all the components present in the solution.

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अध्याय 1: Solutions - Exercises [पृष्ठ २७]

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एनसीईआरटी Chemistry Part 1 and 2 [English] Class 12
अध्याय 1 Solutions
Exercises | Q 1.3 (i) | पृष्ठ २७

संबंधित प्रश्न

Calculate the molarity of the following solution: 

30 g of \[\ce{Co(NO3)2 * 6H2O}\] in 4.3 L of solution.


Concentrated nitric acid used in laboratory work is 68% nitric acid by mass in aqueous solution. What should be the molarity of such a sample of the acid if the density of the solution is 1.504 g mL−1?


A solution of glucose in water is labelled as 10% w/w, what would be the molality and mole fraction of each component in the solution? If the density of solution is 1.2 g mL−1, then what shall be the molarity of the solution?


An antifreeze solution is prepared from 222.6 g of ethylene glycol (C2H6O2) and 200 g of water. Calculate the molality of the solution. If the density of the solution is 1.072 g mL−1, then what shall be the molarity of the solution?


A sample of drinking water was found to be severely contaminated with chloroform (CHCl3) supposed to be a carcinogen. The level of contamination was 15 ppm (by mass):

  1. express this in percent by mass.
  2. determine the molality of chloroform in the water sample.

Define Normality.


Molarity of the solution is ____________.


1 M, 2.5 litre NaOH solution is mixed with another 0.5 M, 3 litre NaOH solution. Then find out the molarity of the resultant solution:


An aqueous solution of glucose is 10% in strength. The volume in which 1 g mole of it is dissolved, will be:


10 g of NaCl is dissolved in 106 g of the solution. Its concentration is ____________.


On adding a solute to a solvent having vapour pressure 0.80 atm, vapour pressure reduces to 0.60 atm. Mole fraction of solute is:


Mole fraction of the solute in a 1.00 molal aqueous solution is ____________.


What is the normality of a 1 M solution of H3PO4?


What is the mole fraction of solute in 1.00 m aqueous solutions?


Match the terms given in Column I with expressions given in Column II.

Column I Column II
(i) Mass percentage  (a) `"Number of moles of the solute component"/"Volume of solution in litres"`
(ii) Volume percentage  (b) `"Number of moles of a component"/"Total number of moles of all the components"`
(iii) Mole fraction (c) `"Volume of the solute component in solution"/"Total volume of solution" xx 100`
(iv) Molality (d) `"Mass of the solute component in solution"/"Total mass of the solution" xx 100`
(v) Molarity (e) `"Number of moles of the solute components"/"Mass of solvent in kilograms"`

Define the following modes of expressing the concentration of a solution. Which of these modes are independent of temperature and why?

V/V (volume percentage)


Match List-I with List-II:

List-I List-II
A. ppm I. molL-¹
B. Molarity II. No units
C. Molality III. Independent of temperature
D. Mole fraction IV. Very dilute solutions

Choose the correct answer from the options given below:


What is the normality of 0.3 m H3Pcl solution?


Calculated the mole fraction of benzene in a solution containing 30% by mass of its is carbon tetrachloride


4.5 g of compound A (MW = 90) was used to make 250 mL of its aqueous solution. The molarity of the solution in M is x × 10−1. The value of x is ______. (Rounded-off to the nearest integer)


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