TS EAMCET 19-July-2022 Shift 1 Solved Paper

Given, KH=105‌atm
Pressure, p=5‌atm
Mole fraction of N2 in air, χN2=0.8.
Partial pressure of N2,
pN2=χN2×p=0.8×5=4‌atm
According to Henry's law,
‌pN2=KHχN2′
‌χN2′=‌

4

105

=4×10−5
It means, 1 mole water contains 4×10−5 moles of N2.
∴10 moles of water contains =4×10−5×10
=4×10−4 moles of N2.