Direction of Reversible Reactions

AP Chemistry· difficulty 2/5

For the reaction A(g) <-> B(g), [A] and [B] vs time are shown.

time concentration [A] [B] eq

Which statement best describes the system at the dashed line?

  • A

    [A] = [B]

  • B

    K = 0

  • C

    Forward and reverse rates are equal

    check_circle
  • D

    All A has been converted to B

Explanation

Equilibrium is defined by equal forward and reverse rates, after which concentrations stop changing. The two concentrations need not be equal.

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