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The partial pressure of ethane over a sa...

The partial pressure of ethane over a saturated solution containing `6.56 xx 10^(-3)g` of ethane is 1 bar. If the solutions were to contain `5.0 xx 10^(-2)g` of ethane, then when will be the partial pressure of the gas ?

Text Solution

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According to Henry.s law, `m prop p rArr m = Kp`
`6.56 xx 10^(-3) g = K xx 1` bar
`K = 6.56 xx 10^(-3) g "bar"^(-1)`
Again, when `m. = 5.00 xx 10^(-2)g, p. = ?`
`m. = K xx p.`
`5.00 xx 10^(-2)g = 6.56 xx 10^(-3)g "bar"^(-1) xx p.`
`p. = (5.00 xx 10^(-2))/(6.56 xx 10^(-3)) = 7.62` bar
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