हिंदी

Why is Molality of a Solution Independent of Temperature?

Advertisements
Advertisements

प्रश्न

Why is molality of a solution independent of temperature?

Advertisements

उत्तर

 

Molality:
Molality is amount of solute per mass of solvent. So, the concentration of solvent is expressed in terms of mass, and the mass of a substance is not affected by the change in temperature. Hence, molality is independent of temperature.

shaalaa.com
  क्या इस प्रश्न या उत्तर में कोई त्रुटि है?
2015-2016 (March)

APPEARS IN

वीडियो ट्यूटोरियलVIEW ALL [1]

संबंधित प्रश्न

Calculate the mass percentage of benzene (C6H6) and carbon tetrachloride (CCl4) if 22 g of benzene is dissolved in 122 g of carbon tetrachloride.


How many mL of 0.1 M HCl are required to react completely with 1 g mixture of Na2CO3 and NaHCO3 containing equimolar amounts of both?


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.

If the density of some lake water is 1.25 g mL−1 and contains 92 g of Na+ ions per kg of water, calculate the molality of Na+ ions in the lake.


When KOH solution is added to potassium dichromate solution the colour of solution
changes to yellow, because _______

(A) chromate ion changes to dichromate ion

(B) dichromate ion changes to chromate ion

(C) oxidation number of chromium changes from + 6 to + 4

(D) oxidation number of chromium changes from + 4 to +6


22.22 gram of urea was dissolved in 300 grams of water. Calculate the number of moles of urea and molality of the urea solution.

(Given: Molar mass of urea = 60 gram mol−1)


Define Normality.


A sample of 12 M Concentrated hydrochloric acid has a density 1.2 M gL-1 calculate the molality.


When a solute is present in trace quantities the following expression is used:


The molarity of the solution containing 7.1 g of Na2SO4 in 100 ml of aqueous solution is ____________.


The molarity of pure water is ____________.


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


How many grams of concentrated nitric acid solution should be used to prepare 250 mL of 2.0M HNO3? The concentrated acid is 70% HNO3:


For preparing 0.1 N solution of a compound from its impure sample of which the percentage purity is known, the weight of the substance required will be:


A solution made by dissolving 40 g NaOH in 1000 g of water is ____________.


Which of the following concentration terms is/are independent of temperature?


Out of molality (m), molarity (M), formality (F) and mole fraction (x), those which are independent of temperature are:


Which of the following is a correct statement for C2H5Br?


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)


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

ppm. (parts per million)


Carbon percentage (by weight) in crude petroleum may be about


What is molarity of resulting solution obtained by mixing 8.5 L of 0.5 m urea solution and 500 ml of 2 m urea solution?


3.36 M sulphuric acid solution is 29% H2SO4 calculate the density of the 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)


250 mL of 0.5 M NaOH was added to 500 mL of 1 M HCl. The number of unreacted HCl molecules in the solution after complete reaction is ______ × 1021. (Nearest integer) (NA = 6.022 × 1023).


The molarity of the solution prepared by dissolving 6.3 g of oxalic acid (H2C2O4 · 2 H2O) in 250 mL of water in mol L-1 is x × 10-2. The value of x is ______. (Nearest integer)

[Atomic mass: H : 1.0, C : 12.0, O : 16.0]


The depression in freezing point of water observed for the same amount of acetic acid, trichloroacetic acid and trifluoroacetic acid increases in the order given above. Explain briefly.


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×