A nitric acid solution flows at a constant rate of 6L/min into a lrg tank that initially held 200 L of a .5% n.a. solution. The solution in the tank is kept well stirred and flows out at a rate of 8L/min. If the solution entering the tank is 20% n.a. determine the vol of n.a. in the tank after t min. When will the percentage of n.a. in the tank reach 10%.

I have literally tried everything. Can't get the right numbers help!

Question

A nitric acid solution flows at a constant rate of 6L/min into a lrg tank that initially held 200 L of a .5% n.a. solution. The solution in the tank is kept well stirred and flows out at a rate of 8L/min. If the solution entering the tank is 20% n.a. determine the vol of n.a. in the tank after t min. When will the percentage of n.a. in the tank reach 10%. 

I have literally tried everything. Can't get the right numbers help!

nfcfox · Answer

This looks more like a chemistry problem

anonymous · Answer

it's differential equations, the mixing problems