The unit of Kc for the system PCl5 - PCl3 +Cl2 is
Correct answer: B. mol/dm3
- A. dm3/mol
- B. mol/dm3
- C. mol/dm6
- D. mol2/dm6
Explanation
This option is correct, since concentration is measured in mol/dm³, we substitute the units:Kc = (mol/dm3) x (mol/dm3) / (mol/dm3) = mol/dm3 after cancellation of all relevant units.
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About Chemical Equilibrium
Reversible reactions reach dynamic equilibrium when forward and reverse rates become equal, and Le Chatelier's principle predicts the effect of changing concentration, pressure or temperature. The chapter also covers solubility product, the common ion effect, buffer action and the conditions used in Haber's process, with equilibrium shifts distinguished from changes in the equilibrium constant.
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