Which of the following changes would shift the reaction shown here to the right (product side)? 4HCl (g) + O2(g) < = > 2Cl2 (g) + 2 H2O (g)

addition of Cl2***
decrease of pressure
increase of pressure
removal of O2

1 answer

Increasing pressure shifts to the lower molar volume side ...

Reactant Side has 5 molar volumes of gas and the product side has 4 molar volumes of gas. Increasing pressure would shift reaction to the 4 molar volume side; that is, shifts rxn right.