Question

For the irreversible process, $A+B\to$ products, the rate is first-order w.r.t. $A$ and second -order w.r.t $B$. If $1.0$ mole each of $A$ and $B$ introduced into a $1.0L$ vessel, and the initial rate was $1.0$ $\times$ 10${}^{-2}$ mol L${}^{-1}$ s${}^{-1}$, rate when half reactants have been turned into products is:

• A. $1.25\times {10}^{-3}mol{L}^{-1}{s}^{-1}$
• B. $1.0\times {10}^{-2}mol{L}^{-1}{s}^{-1}$
• C. $2.50\times {10}^{-3}mol{L}^{-1}{s}^{-1}$
• D. $2.0\times {10}^{-2}mol{L}^{-1}{s}^{-1}$

Answer 1

The correct option is A $1.25\times {10}^{-3}mol{L}^{-1}{s}^{-1}$