CBSE Guess > Papers > Important Questions > Class XII > 2013 > Chemistry > II- Henry's law (Numerical) By Mr. R. Srinivas Vasudevamurthy
CBSE CLASS XII
Henry's law (Numerical)
1. How many millimoles of N2 gas would dissolve in 1 litre of water at 293K? N2 gas exerts a pressure of 0.987 bar. KH for N2 at 293 K is 76.4 kilo bar.
2. Partial pressure of ethane over a saturated solution containing 6.56x10-2 gram of ethane is 1 bar. What will be the partial pressure of the gas if it contains 5x 10-2 grams of ethane.
3. Solubility of H2S in water at STP is 0.195 m. Calculate KH.
4. KH for CO2 in water is 1.67x108 Pa at 298K. Calculate the mass of CO2 that can be dissolved in 500 ml of water at a pressure of 2.5 atmosphere at 298K. ( 1 atm= 1.013 x105 Pa)
5. Air is a mixture gases. It contains 20% by volume of O2 gas and 79% by volume of N2 gas at 298K. Water is in quilibrium with air at a pressure of 10 atmospheres. KH for O2 and N2 at 298 K are 3.30x107mm and 6.51x 107 mm respectively. Determine the composition of these gases in water.
Submitted By : Mr. R. Srinivas Vasudevamurthy
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