if air contains 78% of nitrogen, what is the solubility of nitrogen in water at 298k
Kh=7.0*10^-4mol.L^-1.atm-1
C=kh*p
C=7.0*10^-4mol.L^-1.atm-1*78*10^-2
C=5*10^-4M
5.46*10^-4
5.46×10^_4mol/L
Answer
5.10*-4
Thank you for help me!
5.46 x 10 -4M
Cg=Kh*Pg
To find the solubility of nitrogen in water at 298 K, we need to refer to solubility tables or data. The solubility of gases in liquids, such as nitrogen in water, is often expressed in terms of Henry's Law.
Henry's Law states that the solubility of a gas in a liquid is directly proportional to the partial pressure of the gas above the liquid. Mathematically, it can be expressed as:
C = k * P
where C is the concentration of the gas in the liquid, k is the Henry's Law constant, and P is the partial pressure of the gas.
However, to apply Henry's Law, we need to know the partial pressure of nitrogen in the air. Given that air contains 78% nitrogen, the partial pressure of nitrogen can be calculated using Dalton's Law of partial pressures.
Dalton's Law states that the total pressure exerted by a mixture of non-reacting gases is equal to the sum of the partial pressures of the individual gases. Mathematically, it can be expressed as:
P_total = P1 + P2 + ... + Pn
where P_total is the total pressure and P1, P2, ... Pn are the partial pressures of each gas.
In this case, since air mainly consists of nitrogen (78%), the partial pressure of nitrogen (P_nitrogen) can be calculated by multiplying the total pressure of air (P_air) by 0.78:
P_nitrogen = P_air * 0.78
Once we have the partial pressure of nitrogen, we can refer to solubility tables or data to obtain the solubility of nitrogen in water at 298 K at that specific partial pressure.
It's important to note that the solubility of gases in liquids also depends on other factors like temperature and presence of other solutes. Therefore, accurate solubility values can be found in specific solubility tables or databases.