Advertisements
Advertisements
प्रश्न
Answer the following in one or two sentences.
Which of the four colligative properties is most often used for molecular mass determination? Why?
उत्तर
i. Among the four colligative properties, osmotic pressure is most often used for molecular mass determination.
ii. Osmotic pressure is much larger and therefore more precisely measurable property than other colligative properties.
Therefore, it is useful to determine molar masses of very expensive substances and of the substances that can be prepared in small quantities.
APPEARS IN
संबंधित प्रश्न
Answer the following in one or two sentences.
A 0.1 m solution of K2SO4 in water has a freezing point of –4.3°C. What is the value of van’t Hoff factor if Kf for water is 1.86 K kg mol–1?
Answer the following in one or two sentences.
How is van’t Hoff factor related to degree of ionization?
Answer the following in one or two sentences.
Which of the following solution will have higher freezing point depression and why?
i. 0.1 m NaCl
ii. 0.05 m Al2(SO4)3
Derive the relationship between the degree of dissociation of an electrolyte and van’t Hoff factor.
At T (K), the molar ionic conductivities of NH; and OH− at infinite dilution are 72 and 198 S cm2 mol−1 respectively. The molar conductivity of 0.01 M NH4OH solution at the same temperature is found to be 9 S cm2 mol−1. The percentage dissociation of NH4OH at this concentration is ____________.
It a centimolal aqueous solution of K3[Fe(CN)6] has degree of dissociation 0.78. What is the value of van't Hoff factor?
Osmotic pressure of a urea solution at 10°C is 500 mm Hg. Osmotic pressure of the solution become 105.3 mm Hg, when it is diluted and temperature is raised to 25°C. The extent of dilution is ____________.
Relationship between van't Hoff's factor (i) and degree of dissociation (α) is ______.
The osmotic pressure of a solution containing 10 g of cane sugar dissolved in 100 mL of water at 70°C is ____________.
If van't Hoff factor of monofluoroacetic acid in water is 1.076. What is it's degree of dissociation?
Which of the following salts of same concentration will have same value of van't Hoff factor as that of K4[Fe(CN)6]?
Van't Hoff factor for K3[Fe(CN)6] is 3.333. What is it's percentage dissociation in water?
Van't Hoff factor (i) for centimolal solution of \[\ce{K3[Fe(CN)6]}\] is 3.333. What is its percentage dissociation?
0.01 m aqueous formic acid solution freezes at – 0.021°C. Calculate its degree of dissociation, Kf = 1.86 K kg mol–1.
The equation that represent general van't Hoff equation is ______.
Calculate the van't Hoff factor assuming the complete dissociation of NaBr in its aqueous solution.
The value of van't Hoff factor will be minimum for ______.
