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Standard XII

Chemistry

Le Chatelier's Principle for Del N Equals to 0

If a groundwa...

Question

If a groundwater contains $H_{2} S$ at a concentration of 2 mg/l, determine the pressure of $H_{2} S$ in head space of a closed tank containing the groundwater at $20^{0} C$ . Given that for $H_{2} S$ , Henry's constant is equal to $6.8 \times 10^{3}$ bar at $20^{0} C$ .

720

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77 \times 10^{2}

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553

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55 \times 10^{2}

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Solution

The correct option is A $720$ Pa
Given
Conc. of Hydrogen sulphide in groundwater is 2mg/L
Henry's
constant for it is 6800bar
Solution
$P_{H_{2} S} = \frac{C o n c . H_{2} S \times K_{h} \times 18}{M o l e c u l a r w e i g h t \times 10^{6}}$
Putting values
$P_{H_{2} S} = 710.5 \times 10^{- 5}$ atm=719.5Pa=720Pa
The correct answer is A

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If a groundwater contains H2S at a concentration of 2 mg/l, determine the pressure of H2S in head space of a closed tank containing the groundwater at 200C. Given that for H2S, Henry's constant is equal to 6.8×103 bar at 200C.

The correct option is A 720 PaGivenConc. of Hydrogen sulphide in groundwater is 2mg/LHenry's constant for it is 6800barSolutionPH2S=Conc.H2S×Kh×18Molecularweight×106Putting valuesPH2S=710.5×10−5atm=719.5Pa=720PaThe correct answer is A

If a groundwater contains $H_{2} S$ at a concentration of 2 mg/l, determine the pressure of $H_{2} S$ in head space of a closed tank containing the groundwater at $20^{0} C$ . Given that for $H_{2} S$ , Henry's constant is equal to $6.8 \times 10^{3}$ bar at $20^{0} C$ .