Chapter 14, Problem 93E

The reaction $\text{AB}\left(\text{aq}\right)\to \text{A}\left(\text{g}\right)+\text{B}\left(\text{g}\right)$ is second order in AB and has a rate constant of 0.0118 ${\text{M}}^{-\text{1}}•s^{-\text{1}}$ at 25.0°C. A reaction vessel initially contains 250.0 mL of 0.100 M AB that is allowed to react to form the gaseous product. The product is collected over water at 25.0°C. How much time is required to produce 200.0 mL of the products at a barometric pressure of 755.1 mmHg? (The vapor pressure of water at this temperature is 23.8 mmHg.)