solve this by presenting step by step solution. and CLEAR SOLUTION Please show in detail. Do not forget to draw the  process flow diagram and explicitly state the OMB balances. Follow the GRESA (given, required, equation, solution, and answer/s) format. 

 

About: Material Balances

Course: Chemical Engineering

 

Initially, an evaporator was fed with an aqueous solution analyzed to contain 10% wt NaCl and 20% KCl at a steady rate of 20 kg/h. As evaporation continues, this feed ran out and a second feed solution was fed to the same evaporator containing 5% wt NaCl and 5% wt KCl at a steady rate of 50 kg/h. Again, this feed ran out and a third feed solution was fed to the same evaporator containing 15% wt NaCl and 5% wt KCI at a steady rate of 10 kg/h. After 336 min, the product was analyzed to contain 42.6% wt NaCl and 50.2% KCI and weighs 25 kg. a. Calculate how long (in min) the first feed, second feed and third feed were fed to the evaporator. b. If the evaporator evaporates a constant amount of water per hour, calculate the rate at which water is evaporated (in kg/h).