• A gas produced in a chemical reaction can be collected by water displacement.
  • Dalton’s law can be used to calculate the amount of the desired gas by subtracting the contribution of the water vapor.
  • The vapor pressure due to water in a sample can be corrected for in order to get the true value for the pressure of the gas.
  • In a lab, 2.20 L of gas is collected over water at a temperature of 30°C and a total pressure of 735.43 mmHg.
  • Find the volume that the dry nitrogen of gas would occupy at STP.
Select from the frequently asked questions below