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Potassium Dichromate

21. Ammonium ...

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21. Ammonium hydrogen sulphide dissociate as follows NH4HS(s) <=>NH3(g)+H2S(g), if solid NH4HS is placed in an evacuated flask at certain temperature it will dissociate until the total pressure is 600 torr. (a) calculate the value of equilibrium constant for the dissociation reaction. (b) additional NH3 is introduced into the equilibrium mixture without changing the temperature until partial pressure of NH3 is 750 torr, what is the partial pressure of H2S under these conditions? What is the total pressure in the flask?

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Q. Ammonium hydrogen sulphide dissociates as follows

N H_{4} H S (s) ⇌ N H_{3} (g) + H_{2} S (g)

N H_{4} H S

is placed in an evacuated flask at certain temperature it will dissociate until the total is

600 t o r r

.
(a) Calculate the value of equilibrium constant for the dissociation reaction.
(b) Additional

N H_{3}

is until introduced into the equilibrium mixture without changing the temperature until partial pressure of

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750 t o r r

, what is the partial pressure of

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under these conditions? What is the total pressure in the flask?

Q. Ammonium hydrogen sulphide dissociates as follows

N H_{4} H S (s) ⇌ N H_{3} (g) + H_{2} S (g)

N H_{4} H S

is placed in an evacuated flask at certain temperature it will dissociate until the total pressure is

600

torr.
a) Calculate the value of equillibrium constant for the dissociation reaction
b) Addional

N H_{3}

is introduced into the equillibrium mixture without changing the temperature until partial pressure of

N H_{3}

750

torr, what is the partial pressure of

H_{2} S

under these conditions? What is the total pressure in the flask?

Q. A flask containing 0.50 atm of ammonia contains some solid

N H_{4} H S

which undergoes dissociation according to

N H_{4} H S (s) ⇌ N H_{3} (g) + H_{2} S (g) .

Calculate the pressure of

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K_{P} = 0.11) .

Also calculate the total pressure.

Q. An amount of solid

N H_{4} H S

is placed in a flask already containing ammonia gas at a certain temperature at

0.50 a t m

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N H_{3}

H_{2} S

gases in the flask. When the decomposition reaction reaches equilibrium, the total pressure in the flask rises to

0.84 a t m

. The equilibrium constant for

N H_{4} H S

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60 c m

. What will be the total pressure when it dissociates at the same temperature in presence of

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N H_{4} H S

dissociates completely into

N H_{3}

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