Advertisements
Advertisements
प्रश्न
State Henry’s law.
State Henry’s law and express it in a mathematical form.
State Henry’s law about the solubility of a gas in a liquid.
Advertisements
उत्तर १
Henry’s Law states that at a constant temperature, the solubility of a gas in a liquid is directly proportional to the partial pressure of that gas above the liquid.
उत्तर २
- Henry was the first to give a quantitative relationship between the pressure and solubility of a gas in a solvent, which is known as Henry’s law. The law states that at a constant temperature, the solubility of a gas in a liquid is directly proportional to the partial pressure of the gas present above the surface of the liquid or solution.
- Dalton, a contemporary of Henry, also concluded independently that the solubility of a gas in a liquid solution is a function of the partial pressure of the gas. If we use the mole fraction of a gas in the solution as a measure of its solubility, then it can be said that the mole fraction of gas in the solution is proportional to the partial pressure of the gas over the solution.
- The most commonly used form of Henry’s law states that “the partial pressure of the gas in the vapour phase (p) is proportional to the mole fraction of the gas (x) in the solution” and is expressed as:
p ∝ x
p = KH . x - Here, KH is Henry’s law constant. When a mixture of more than one gas is brought into contact with a solvent, each gaseous component dissolves in proportion to its partial pressure. That is why Henry’s law is applied to every gas, independent of the presence of other gases.
Notes
Students can refer to the provided solutions based on their preferred questions and marks.
APPEARS IN
संबंधित प्रश्न
What is the effect of temperature on solubility of a gas in a liquid?
Explain, why do aquatic animals prefer to stay at lower level of water during summer?
Gas (A) is more soluble in water than Gas (B) at the same temperature. Which one of the two gases will have the higher value of KH (Henry’s constant) and why
Why do gases always tend to be less soluble in liquids as the temperature is raised?
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
The air is a mixture of a number of gases. The major components are oxygen and nitrogen with approximate proportion of 20% is to 79% by volume at 298 K. The water is in equilibrium with air at a pressure of 10 atm. At 298 K if the Henry’s law constants for oxygen and nitrogen are 3.30 × 107 mm and 6.51 × 107 mm respectively, calculate the composition of these gases in water.
Which mixture is used for respiration by deep sea divers?
(A) He + O2
(B) Ne + O2
(C) Ar + O2
(D) Kr + O2
How does solubility of a gas in water varies with the temperature?
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.
State Henry's Law. What is the effect of temperature on the solubility of a gas in a liquid?
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]
A solution is prepared by dissolving 9.25 g of non-volatile solute in 450 mL of water. It has an osmotic pressure of 350 mm of Hg at 27°C. Assuming the solute is non-electrolyte, determine its molecular mass. (R = 0.0821 Lit-atm K−1 mol−1)
Write the name of gas released when Cu is added to dilute HNO3
Write the name of gas released when Cu is added to the conc. HNO3
Which law shows relation between pressure and solubility of a gas in solvent?
The statement “If 0.003 moles of a gas are dissolved in 900 g of water under a pressure of 1 atmosphere, 0.006 moles will be dissolved under a pressure of 2 atmospheres”, illustrates.
According to Henry’s law, the amount of gas that will dissolve in blood plasma or any other liquid is determined by which of these factors?
Henry’s law constant of oxygen is 1.4 × 10–3 mol lit–1 atm–1 at 298 K. How much of oxygen is dissolved in 100 ml at 298 K when the partial pressure of oxygen is 0.5 atm?
Low concentration of oxygen in the blood and tissues of people living at high altitude is due to ______.
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.
Explain the following phenomena with the help of Henry’s law.
Feeling of weakness and discomfort in breathing at high altitude.
Assume that argon exerts a partial pressure of 6 bar. Calculate the solubility of argon gas in water. (Given Henry’s law constant for argon dissolved in water, KH = 40 k bar)
Henry's constant (in k bar) for four gases α, β, γ and δ in water at 298 K is given below:
| α | β | γ | δ | |
| KH | 50 | 2 | 2 × 10-5 | 0.5 |
(density of water = 103 kg m-3 at 298 K)
This table implies that:
Solubility of gas in liquid decreases with increase in ______.
In which of the following solvents, the \[\ce{C4H8NH3+X–}\] is soluble?
Write the two applications of Henry’s law.
Assertion (A): Helium is used to dilute oxygen in diving apparatus.
Reason (R): Helium has high solubility in O.
In the light of the above statements, choose the correct answer from the options given below:
