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State the Henry's law about partial pres...

State the Henry's law about partial pressure of a gas in a mixture.

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Henry.s law about partial pressure of a gas in a mixture
The partial pressure of the gas (p) in vapour phase is proportional to the mole fraction of the gas (x) in the solution. It may be expressed as
`p = K_H.x`
where p = partial pressure of the gas
`K_H` = Henry.s constant
x = mole fraction of the gas
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