Easy Practice — Set 2

Quick Recap — Rate Laws & Plots

• Elementary reaction: order $=$ molecularity. For $A+B\to$ products, rate $=k[A][B]$.
• First order: $k=\dfrac{2.303}{t}\log\dfrac{[A]_0}{[A]}$; a plot of $\ln[A]$ vs $t$ is a straight line (slope $-k$); $t_{1/2}=0.693/k$.
• Zero order: $[A]=[A]_0-kt$; $[A]$ vs $t$ is linear; $t_{1/2}=[A]_0/2k$.
• Rate-constant units: order $n\Rightarrow$ (mol L$^{-1}$)$^{1-n}$ s$^{-1}$. Temperature coefficient (rate ratio per 10$^\circ$C) $\approx2$-$3$.