A holding tank with capacity 5000 litres initially contains 1500litres of 25 mM NaCl solution. a) What is the final concentrationof NaCl (expressed in mM) if an additional 3000 litres of 25 mMNaCl solution is pumped into the tank? b) Instead of (a), if 3000litres of water are added to the tank, what is the finalconcentration of NaCl (expressed in mM)? c) Instead of (a) or (b),if an additional 500 litres of 25 mM NaCl solution plus 3000 litresof water are added, what is the final concentration of NaCl:
iv. Expressed as ppm? (ppm means g per 106 g of solution) Youcan assume that the density of the solution (NaCl + water) is thesame as the density of water – this assumption is appropriate sincethis is a dilute solution. Assume density of water to be 1 g/cm3.
Note: mM means milli-molar (1 mM means 1 milli-mol/liter)
