A sodium chloride solution is being pumped into a larage leak-proof container at

Question

A sodium chloride solution is being pumped into a larage leak-proof container at a rate of 7 liters per minute. The container originally contained 60 liters of liquid that contained no sodium chloride. However, right before the solution started being pumped in and out , 1/2 kg of sodium chloride was dissolved into the liquid. the fluid in the container is being pumped out at a rate of 7 liters per minute. the concentration of sodium chloride in the solution being pumped into the tank is 0.4 kg per liter. Assume uniform concentration of sodium chloride in the solution in the container, obtained by constant stant stirring.

a) Determine the amount (mass) of the sodium chloride in the container after t minutes

b) When will the sodium chloride concentration in the tank equal 0.02 kg per liter.

Explanation / Answer

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