English
Karnataka Board PUCPUC Science 2nd PUC Class 12

Define the following modes of expressing the concentration of a solution. Which of these modes are independent of temperature and why? (iii) w/V (mass by volume percentage)

Advertisements
Advertisements

Question

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

(iii) w/V (mass by volume percentage)

Long Answer
Advertisements

Solution

It is mass by volume percentage (W/v): thus mathematically,

= `"W of solute"/"100 ml of solution" xx 100`

where W is weight of solute in grams, but measures volume of solution in mililitres (ml)

shaalaa.com
  Is there an error in this question or solution?
Chapter 2: Solutions - Exercises [Page 27]

APPEARS IN

NCERT Exemplar Chemistry Exemplar [English] Class 12
Chapter 2 Solutions
Exercises | Q VI. 55. (iii) | Page 27

RELATED QUESTIONS

Calculate the mole fraction of benzene in solution containing 30% by mass in carbon tetrachloride.


Calculate the molarity of the following solution:

30 g of Co(NO3)2 . 6H2O in 4.3 L of solution.


Define mass percentage.


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?


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?


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.


Nalorphene (C19H21NO3), similar to morphine, is used to combat withdrawal symptoms in narcotic users. Dose of nalorphene generally given is 1.5 mg. Calculate the mass of 1.5 × 10−3 m aqueous solution required for the above dose.


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


Which of the following is a quantitative description of the solution?


If N/10 50 ml H2SO4, N/3 30 ml HNO3, N/2 10 ml HCl is mixed and solution is made to 1 L. Then normality of the resultant solution is:


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


Which of the following units is useful in relating concentration of solution with its vapour pressure?


The number of moles of NaCl in 3 litres of 3 M solution is ____________.


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)


The concentration of water molecules in pure water at 298 K is?


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?


What is the normality of 0.3 m H3Pcl solution?


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).


A 6.50 molal solution of KOH (aq.) has a density of 1.89 g cm−3. The molarity of the solution is ______ mol dm−3. (Round off to the Nearest Integer)

[Atomic masses: K: 39.0 u; O: 16.0 u; H: 1.0 u]


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×