Advertisements
Advertisements
प्रश्न
H2S, a toxic gas with rotten egg like smell, is used for the qualitative analysis. If the solubility of H2S in water at STP is 0.195 m, calculate Henry’s law constant.
Advertisements
उत्तर
Solubility of H2S gas = 0.195 m
∴ Moles of H2S = 0.195 mol
Mass of water = 1000 g
No. of moles of water = `(1000 "g")/(18 "g mol"^(-1))`
= 55.55 mol
∴ Mole fraction of H2S gas in the solution (x) = `0.195/(0.195+55.56)`
= `0.195/55.745`
= 0.0035
Pressure at STP = 1 bar
According to Henry’s law,
`"p"_("H"_2"S") = "K"_"H" xx "x"_("H"_2"S")`
or, KH = `("p"_("H"_2"S"))/("x"_("H"_2"S"))`
= `(1 "bar")/(0.0035)`
= 285.7 bar
APPEARS IN
संबंधित प्रश्न
Explain, why do aquatic animals prefer to stay at lower level of water during summer?
Henry’s law constant for CO2 in water is 1.67 × 108 Pa at 298 K. Calculate the quantity of CO2 in 500 mL of soda water when packed under 2.5 atm CO2 pressure at 298 K.
Based on solute-solvent interactions, arrange the following in order of increasing solubility in n-octane and explain.
Cyclohexane, KCl, CH3OH, CH3CN
Henry’s law constant for the molality of methane in benzene at 298 K is 4.27 × 105 mm Hg. Calculate the solubility of methane in benzene at 298 K under 760 mm Hg.
Give reasons for the following :
Aquatic animals are more comfortable in the cold water than in warm water.
The solubility product (Ksp) of BaSO4 is 1.5 X 10-9.Calculate the solubility of barium sulphate in pure water and in 0.1 M BaCl2.
The solubility product of PbCl2 at 298K is 1.7 × 10-5. Calculate the solubility of PbCl2 in g/lit. at 298K.
Atomic Weights: [Pb = 207 and Cl = 35.5]
Which of the following factor(s) affect the solubility of a gaseous solute in the fixed volume of liquid solvent?
(a) nature of solute
(b) temperature
(c) pressure
(i) (a) and (c) at constant T
(ii) (a) and (b) at constant P
(iii) (b) and (c) only
(iv) (c) only
Solubility of gases in liquids decreases with rise in temperature because dissolution is an ______.
KH value for \[\ce{Ar(g)}\], \[\ce{CO2(g)}\], \[\ce{HCHO (g)}\] and \[\ce{CH4(g)}\] are 40.39, 1.67, 1.83 × 10–5 and 0.413 respectively. Arrange these gases in the order of their increasing solubility.
Explain the solubility rule “like dissolves like” in terms of intermolecular forces that exist in solutions.
What is the significance of Henry’s Law constant KH?
Explain the following phenomena with the help of Henry’s law.
Painful condition known as bends.
Match the items given in Column I with the type of solutions given in Column II.
| Column I | Column II |
| (i) Soda water | (a) A solution of gas in solid |
| (ii) Sugar solution | (b) A solution of gas in gas |
| (iii) German silver | (c) A solution of solid in liquid |
| (iv) Air | (d) A solution of solid in solid |
| (v) Hydrogen gas in palladium | (e) A solution of gas in liquid |
| (f) A solution of liquid in solid |
The solubility of a gas in water depends on ______
Explain the following phenomena with the help of Henry’s law.
Feeling of weakness and discomfort in breathing at high altitude.
Solubility of gas in liquid decreases with increase in ______.
Identify that the following compound is insoluble, partially soluble or highly soluble in water:
Ethylene glycol
Identify that the following compound is insoluble, partially soluble or highly soluble in water:
Chloroform
