Suppose a tank contains H2S at a pressure of 10.00 atm and a temperature of 800...

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Suppose a tank contains H2S at a pressure of 10.00 atm and a temperature of 800...

Suppose a tank contains H2S at a pressure of 10.00 atm and a temperature of 800 K. When the reaction has come to equilibrium, the partial pressure of S2 vapor is 0.020 atm.

2H2S(g)⇌2H2(g)+S2(g)

Calculate Kp- report your answers using the appropriate number of significant figures and in scientific notation.

Ozone, O3 (g) will decompose to diatomic oxygen, O2 (g) in the stratosphere.

Write the balanced chemical reaction that describes the equilibrium between ozone (the reactant) and oxygen (the product).

An increase in pressure will ____?

Suppose a 0.075 M ethylamine, CH3CH2NH2 solution is prepared. The Kb for ethylamine is 6.4 x 10-4.

(a) The Ka of ethylamine's conjugate acid is _____.

(b) The concentration of OH- is ____ M

(c) The concentration of H3O+ is _____ M

(d) The pH of the solution is ._____.

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Answer 1

Answer #1

1.

The balanced equilibrium reaction is

It is given that the initial pressure of H2S = 10.00 atm

Using an ICE table, we can calculate the equilibrium partial pressures


Initial, atm	10.00	0	0
Change, atm	-2x	+2x	+x
Equilibrium, atm	10.00 - 2x	2x	x

It is given that at equilibrium.

Hence, x = 0.020 atm

Hence,

Hence, the equilibrium constant Kp can be calculated as

2.

The equilibrium between ozone and oxygen can be written as

With increase in pressure, the partial pressure of O2 will increase more than O3 since there are more number of moles of O2 than O3.

Hence, according to Le Chatelier's principle, the reaction will move in a way to counter that change. Hence, the reaction equilibrium will shift to the left i.e. more O2 will be converted to O3 if pressure is increased.

Hence,

An increase in pressure will shift the reaction to the reactant side.

3.

a) Given that the Kb of the base ethylamine is , we can calculate the Ka of its conjugate acid as follows

b) The reaction of the base with water can be written as

Given that the initial concentration of ethylamine = 0.075 M, we can construct an ICE chart to calculate the equilibrium concentration of all species


Initial, M	0.075	0	0
Change, M	-x	+x	+x
Equilibrium, M	0.075-x	x	x

From the Kb expression of the base

Hence, the equilibrium concentrations of OH- is

c)

Using the relation

d)

pH of the solution can be calculated as follows:

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Answer 2

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Suppose a tank contains H2S at a pressure of 10.00 atm and a temperature of 800...

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