Advertisements
Advertisements
प्रश्न
Calculate the boiling point elevation for a solution prepared by adding 10 g of MgCl2 to 200 g of water, assuming MgCl2 is completely dissociated.
(Kb for Water = 0.512 K kg mol−1, Molar mass MgCl2 = 95 g mol−1)
Advertisements
उत्तर
We know that
ΔTb = iKbm
\[\ce{MgCl2 -> \underset{1 + 2}{Mg^{2+} + 2Cl^-}}\]
i = 3
Here, m = `("W"_"B" xx 1000)/("M"_"B" xx "W"_"A")` = 0.526
ΔTb = iKbm
= 3 × 0.512 × 0.526
= 0.808 K
APPEARS IN
संबंधित प्रश्न
Calculate the boiling point of solution when 4g of MgSO4 (M= 120 g mol-1) was dissolved in 100g of water, assuming MgSO4 undergoes complete ionization. (Kb for water = 0.52 K kgmol-1)
Why is elevation of boiling point a colligative property?
Derive the relation between the elevation of boiling point and molar mass of solute.
Arrange the following in increasing order of boiling points:
(CH3)3 N, C2 H5 OH, C2 H5 NH2
0.450 g of urea (mol. wt. 60) in 22.5 g of water show 0.170°C of elevation in boiling point. The molal elevation constant of water is:
People add sodium chloride to water while boiling eggs. This is to ____________.
Calculate the molal elevation constant for water given that 0.2 molal solution of non-volatile and non-electrolyte solute increases the boiling point of water by 0.104 K.
The boiling point to a solution containing 50 gm of a non-volatile solute in 1 kg of solvent is 0.5° higher than that of pure solvent. Determine the molecular mass of the solute (give molecular mass of solvent) = 78 g mol–1 and kb for solvent = 2.53 km–1)
Molal elevation of boiling point constant is the elevation of boiling point produced by ______
AB2 is 10% dissociated in water to A2+ and B−. The boiling point of a 10.0 molal aqueous solution of AB2 is ______°C. (Round off to the Nearest Integer).
[Given: Molal elevation constant of water Kb = 0.5 K kg mol−1 boiling point of pure water = 100°C]
