2 upper N upper o upper c l double-headed arrow 2 upper N upper O (g) plus upper C l subscript 2 (g). At equilibrium, the concentrations are as follows.

[NOCl] = 1.4 ´ 10–2 M

[NO] = 1.2 ´ 10–3 M

[Cl2] = 2.2 ´ 10–3 M

The equilibrium constant for the reaction is 0.000016.

Explanation:

Equilibrium constant is defined as the ratio of concentration of products to the concentration of reactants each raised to the power their stoichiometric coefficients.

The given balanced equilibrium reaction is,

The expression for equilibrium constant for this reaction will be,

Now put all the given values in this expression, we get :

Thus the equilibrium constant for the reaction is 0.000016.

answers: to make sure that all of the broken pieces of tablet were added to the water, to allow for fair comparison of all three trials, with different particle sizes to avoid experimental error