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Write the equilibrium constant expression for the following reaction in terms of concentrations of the components. (Concentratio

timofeeve [1]

Answer: The expression for equilibrium constant in terms of concentration is $K_c=[CO_2]$

Explanation:

Equilibrium constant in terms of concentration is defined as the ratio of concentration of products to the concentration of reactants each raised to the power their stoichiometric coefficients. It is represented by $K_{c}$

For a general chemical reaction:

$aA+bB\rightarrow cC+dD$

The $K_{c}$ is written as:

$K_{c}=\frac{[C]^c[D]^d}{[A]^a[B]^b}$

The concentration of pure solids and pure liquids are taken as 1.

For the given chemical reaction:

$MgCO_3(s)\rightarrow MgO(s)+CO_2(g)$

The expression for $K_{c}$ is:

$K_{c}=\frac{[MgO][CO_2]}{[MgCO_3]}$

In the above expression, magnesium oxide and magnesium carbonate will not appear because they are present in solid state.

So, the expression for $K_c$ becomes:

$K_{c}=[CO_2]$

Hence, the equilibrium constant for the reaction is given above.

4 0

3 years ago

What is the value of the equilibrium constant for this redox reaction?

aivan3 [116]

Correct answer: Option D, K = 5.04 × 10^52

Reason:
We know that,
Ecell = $\frac{0.0592}{n}log(K)$ ,
where n = number of electrons = 2 (in present case)
K = equilibrium constant.

Also, Ecell = +1.56 v

Therefore, 1.56 = $\frac{0.0592}{2}log(K)$
Therefore, log (K) = 52.703
Therefore, K = 5.04 X 10^52

8 0

3 years ago

Read 2 more answers

Two hydrogen atoms interact to form a hydrogen molecule. Classify the following statements that describe the stages of bond form

shtirl [24]

Answer:

Attractive force is predominant between the two atoms

The two hydrogen atoms approach each other to form a bond
The two hydrogen atoms start to combine to form a hydrogen molecule

Repulsive force is predominant between the two atoms

The potential energy of the system is positive
The internuclear distance between the two hydrogen atoms is less than the bond length

Attractive and repulsive forces balance each other

The two hydrogen atoms form a stable hydrogen molecule
The potential energy of the system is at minimum

There is no interaction between the two atoms

The hydrogen atoms are very far apart

Explanations:

increase in potential energy causes repulsion between the atoms, whereas decrease in potential energy causes attraction between the atoms
in order for the bonding to occur, the attractive forces must be greater than the repulsion forces.
The potential energy is positive when the repulsion forces is greater. This is because the distance between the two atoms is smaller than the bond length
The potential energy of the system is at its minimum because the attractive and repulsive forces balance out each other.