Question

How many mL of 60 mM and 20 mM NaCl solutions should be mixed to obtain 320 mL of 0.03 M NaCl solution. Assume that densities of all solutions are 1 g/mL.​

Answer 1

Answer:

1000 g H2O x 20 g NaCl/80 g H2O = 250 g. Therefore, 250 g of NaCl must be dissolved in 1000 g of water to make a 20 % NaCl solution.