Question

# Consider the reaction: H2 (g) + Br2 (g) ⇆ 2HBr (g). What is the expression for...

Consider the reaction: H2 (g) + Br2 (g) ⇆ 2HBr (g). What is the expression for Kc for this reaction?

Consider the reaction: H2 (g) + Br2 (g) ⇆ 2HBr (g) If the value of the equilibrium constant is very large, which species will predominate at equilibrium?

Consider the reaction: Ti (s) + 2Cl2 (g) ⇆ TiCl4 (l) What is the expression for Kc for this reaction?

1)

Kc is defined as concentration of product by concentration of reactant with each concentration term raised to power that is equal to its stoichiometric coefficient in balanced equation

pure liquid and solid do not appear in Kc

so,

Kc = [HBr]^2 / [H2][Br2]

Answer: Kc = [HBr]^2 / [H2][Br2]

2)

If Kc is very large, it means that there is large amount of product.

So, HBr would be in larger quantity.

3)

pure liquid and solid do not appear in Kc

So, Ti(s) and TiCl4(l) will not appear in Kc expression

So,

Kc = 1/[Cl2]^2

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