1. Example: Separation
One method of producing drinkable water is to force seawater through a membrane that does not allow the salt to pass through. A large facility continuously filters 2300 L of seawater per hour. The seawater contains sodium chloride (NaCl) at a concentration of 1.4 M. Two streams emerge from the facility: (1) a “brine” stream with a sodium chloride concentration of 5.6 M and flow rate of 560 L/hr and (2) a drinking water stream. The densities of the three streams can be considered to be the same. What is the sodium chloride concentration in the drinking water.

3. Example: Separation, Again