A student monitors a reversible reaction at and records the instantaneous rates shown

CHEMISTRY · Single correct · A Level · Chemistry · Chemical equilibria (Le Chatelier’s principle and Kc) · Chemical equilibria (Le Chatelier’s principle and Kc)

Problem

A student monitors a reversible reaction at 298 K298\,\text{K} and records the instantaneous rates shown. Time (s) Rate\_forward (mol⋅L−1⋅s−1\text{mol}\cdot\text{L}^{-1}\cdot\text{s}^{-1}) Rate\_reverse (mol⋅L−1⋅s−1\text{mol}\cdot\text{L}^{-1}\cdot\text{s}^{-1}) 10     4.5×10−34.5 \times 10^{-3}      2.1×10−32.1 \times 10^{-3} 20     3.0×10−33.0 \times 10^{-3}      3.0×10−33.0 \times 10^{-3} 30     1.8×10−31.8 \times 10^{-3}      2.7×10−32.7 \times 10^{-3} At which recorded time is there a net conversion of products into reactants? (a) 20 s20\,\text{s} (b) 30 s30\,\text{s} (c) 10 s10\,\text{s} (d) None of the recorded times

Related theory

Browse the problem library