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A sample of HI(g) is placed in a flask a...

A sample of HI(g) is placed in a flask a pressure of 0.2 atm. At equilibrium partial pressure of HI(g) is 0.04 atm. What is `K_p` for the given equilibrium ?
`2HI(g) hArr H_(2)(g) + I_(2)(g)`

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Verified by Experts

`pHI =0.04` atm `pH_2 = 0.08` atm `Pl_(2)` =0.08 atm
`K_(p) = (PH_2 xxpl_2)/(P_(HI)^2) = ((0.08 atm )xx(0.08))/((0.04 atm ) xx (0.04 atm))=4.0`
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