At equilibrium, the concentration of A is 0.208 mol/L what is the concentration

Question

At equilibrium, the concentration of A is 0.208 mol/L what is the concentration of B at equilibrium? A) 0.500 mol/L B) 0.208 mol/L C) 0.416 mol/L D) 0.249 mol/L E) none of these In which of the following reactions does an instantaneous increase in the volume of the reaction vessel favor formation of the products?A) PCl_ (g) Rightwardsharpoonoverleftwardsharpoon PCl_3 (G) + Cl_2 (g) B) N_2 (g) + 3H_2 (g) Rightwardsharpoonoverleftwardsharpoon 2NH_3 (g) C) N_2 (g) + O_2 (g) Rightwardsharpoonoverleftwardsharpoon 2NO (g) D) MgO(s) + CO_2(g) Rightwardsharpoonoverleftwardsharpoon MgCO_3 (s) E) H_2(g) + I_2(g) Rightwardsharpoonoverleftwardsharpoon 2HI(g)

Explanation / Answer

(8)

A> PCl5 (g) = PCl3 (g) + Cl2 (g)

According to Lechatlier's principle, increase in volume favours the equilibrium towards the more number of gaseous substances.

In the aboe equilibrium, number fo gaseous reactants = 1

but number of gaseous products = 2

SO, on increasing volume, it shifts the equilibrium towards right side i.e. towards more number of gas substances.

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