MDCAT Chemistry MCQ #2220

What are the units of the equilibrium constant Kc for the synthetic reaction A + B ℑ C, where all species are in aqueous phase?

MDCAT Chemistry MCQ #2220

  1. Question 1

    Q1. What are the units of the equilibrium constant Kc for the synthetic reaction A + B ℑ C, where all species are in aqueous phase?

    • A) No units
    • B) mol dm⁻³
    • C) dm³ mol⁻¹
    • D) mol² dm⁻⁶

    Answer: dm³ mol⁻¹

    Explanation: Kc units are (mol/dm³)^Δn. Here Δn = 1 - (1+1) = -1, so units are dm³/mol. Option A is for reactions where Δn = 0.