The units of K_c depend on the equation, because the powers may not cancel. Work them out from the expression: each concentration is in mol L^-1, so substitute the units and simplify. Many syllabus problems quote K_c without units, but you should be ready to derive them.

TASChemistryQuick questions

Unit 3: Equilibrium, Acids and Redox

Quick questions on The equilibrium constant Kc - TCE Chemistry (Tasmania)

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What are units?

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The units of

K_c

depend on the equation, because the powers may not cancel. Work them out from the expression: each concentration is in

\text{mol L}^{-1}

, so substitute the units and simplify. Many syllabus problems quote

K_c

without units, but you should be ready to derive them.

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