Find the percentage of unreacted reactant for zero order reaction in 90 second having rate constant $1…
Find the percentage of unreacted reactant for zero order reaction in 90 second having rate constant $1 \mathrm{~mol} \mathrm{dm}^{-3} \mathrm{~s}^{-1}$.
$5 \%$
$10 \%$
$15 \%$
$20 \%$
Solution
The rate constant of zero order reaction is given by equation
$\mathrm{k}=\frac{[\mathrm{A}]_0-[\mathrm{A}]_{\mathrm{t}}}{\mathrm{t}}$
$\operatorname{Let}[\mathrm{A}]_0=100 \%$
$\begin{array}{ll}
\therefore & 1 \mathrm{~mol} \mathrm{dm}^{-3} \mathrm{~s}^{-1}=\frac{100-[\mathrm{A}]_{\mathrm{t}}}{90} \\
\therefore & {[\mathrm{~A}]_{\mathrm{t}}=100-90=10 \%}
\end{array}$