Use the mole fraction equation to determine the partial pressure of krypton
Step 1
Given data
A gas mixture contains -
Nitrogen
krypton
total pressure is 745 mmHg.
Step 2
Solution-
calculate the mole fraction of the component-
Mole fraction of tha erypton —
partial pressure of the crypton:
total pressure x mole fraction of the crypton
Step 1
Given:
Mass of nitrogen =75.2 g (75.2% by mass)
Mass of krypton =24.8 g (24.8% by mass)
Total pressure =745 mm Hg
Step 2
To determine the partial pressure of krypton as follows,
Molar mass of nitrogen =28.02
Calculating the moles of nitrogen using the formula,
=2.68mol
Molar mass of krypton =83.80
Calculating the moles of krypton using the formula,
Mass of krypton
=0.296mol
Step 3
To calculate the mole fraction of krypton,
Moles of krypton,
Partial pressure of krypton =Total pressure * Mole fraction of krypton
Substituting the values in the above formula,
Partial pressure of krypton =745mmHg*0.0995=74.1mmHg
Hence, the partial pressure of krypton in the given mixture is 74.1mmHg .
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