At 25°C, K = 0.090 for the following reaction:H2O(g) + Cl2O(g) 2 HOCl(g)

Question

Calculate the concentrations of all species at equilibrium for each of the following cases.

(a) 1.2 g H2O and 1.6 g Cl2O are mixed in a 1.4 L flask.

(b) 1.2 mol pure HOCl is placed in a 1.9 L flask

Answer 1

You REALLY should put in arrows. How are we to know the products from the reactants? BUT, as I chemist I can GUESS but that's the best I can do.
H2O + Cl2O ==> 2HOCl
Write the Keq expression.
Change 1.2 g H2O and 1.6 g Cl2O to moles and change that to concn using mols/L and the 1.4L flask. Then do an ICE chart, plug into Keq and solve for each.

Same for (b) BUT instead of going to the right to establish equilibrium the reaction must go to the left to establish equilibrium.