$\mathrm{A} ightarrow \mathrm{P}$ is a zero order reaction. At 298 K the rate constant of the reaction is $1 imes 10^{-3} \mathrm{~mol}^{-1} \mathrm{~s}^{-1}$. Initial concentration of ' $A$ ' is $0.1 \mathrm{~mol} \mathrm{~L}^{-1}$. What is the concentration of ' $A$ ' after 10 sec ?

Question

$\mathrm{A} ightarrow \mathrm{P}$ is a zero order reaction. At 298 K the rate constant of the reaction is $1 	imes 10^{-3} \mathrm{~mol}^{-1} \mathrm{~s}^{-1}$. Initial concentration of ' $A$ ' is $0.1 \mathrm{~mol} \mathrm{~L}^{-1}$. What is the concentration of ' $A$ ' after 10 sec ?

Aicharya · Accepted Answer

Given, $\begin{aligned} & \mathrm{K}=10^{-3} \mathrm{~mol} \mathrm{~L}^{-1} \mathrm{~s}^{-1} \ & {\left[\mathrm{~A}_{\mathrm{o}}ight]=0.1 \mathrm{~mol} \mathrm{~L}^{-1}} \ & \mathrm{t}=10 \mathrm{~s} \end{aligned}$ for zero order, $\begin{aligned} & {\left[\mathrm{A}_{+}ight]=\left[\mathrm{A}_0ight]-\mathrm{kt}} \ & {\left[\mathrm{~A}_{+}ight]=0.1-10^{-3} 	imes 10} \ & =0.1-10^{-2} \ & =0.09 \mathrm{~mol} \mathrm{~L}^{-1} \end{aligned}$

$\mathrm{A} \rightarrow \mathrm{P}$ is a zero order reaction. At 298 K the rate constant of the reaction is…

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