Advertisements
Advertisements
प्रश्न
Define the following modes of expressing the concentration of a solution. Which of these modes are independent of temperature and why?
m (Molality)
Advertisements
उत्तर
The no. of moles of solute per kg of solvent
Molality (m) = `"Moles of solute"/"Mass of solvent in kg"`
Effect of temperature: Mass % ppm, mole fraction and molality do not change with temperature where as molarity, volume percentage and mass by volume percentage changes with temperature because volume of solution (liquid) varies with changes in temperature.
APPEARS IN
संबंधित प्रश्न
Calculate the mole fraction of benzene in solution containing 30% by mass in carbon tetrachloride.
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.
What is molal depression constant? Does it depend on nature of the solute?
Molality of a solution relates the ____________.
Molarity of liquid HCl will be if the density of the solution is 1.17 gm/cc.
25 ml of a solution of barium hydroxide on titration with a 0.1 molar solution of hydrochloric acid gave a titre value of 35 ml. The molarity of barium hydroxide solution was ______.
What is the normality of a 1 M solution of H3PO4?
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:
A solution is prepared by dissolving 10 g NaOH in 1250 mL of a solvent of density 0.8 mL/g. The molality of the solution in mol kg–1 is:
Which of the following concentration unit is independent of temperature?
Out of molality (m), molarity (M), formality (F) and mole fraction (x), those which are independent of temperature are:
Cone. H2SO4 is 98% H2SO4 by mass has d = 1.84 g cm−3. Volume of acid required to make one litre of 0.1 M H2SO4 is:
Define the following modes of expressing the concentration of a solution. Which of these modes are independent of temperature and why?
w/w (mass percentage)
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?
(iii) w/V (mass by volume percentage)
Define the following modes of expressing the concentration of a solution. Which of these modes are independent of temperature and why?
M (Molarity)
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 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.
