Question

In this lab you will need to prepare solutions using dilutions. Starting with the stock 0.300 M NaOH solution, how would you prepare a 0.100 M NaOH solution (using 0.300 M NaCl as the diluent)

Answer 1

Answer:

1/3 dilution : 1 volume of stock solution + 2 volumes of diluent

Explanation:

Concentrated solution = 0.300 NaOH

Diluted solution = 0.100 NaOH

The dilution factor is : 0.100/0.300 = 1/3

Thus, we have to dilute three times the stock solution. For this, we take 1 volume of stock solution and then we add 2 volumes of diluent. As result, we will have 1 volume of stock solution in a total of 3 volumes. For example, we take 1 mL of 0.300 NaOH and then we add 2 mL of diluent (0.300 NaCl). The final concentration after dilution will be:

Cd = 0.300 M x 1 mL/3 mL = 0.100 M