Question

How many grams of sodium chloride is required to make a 120 mL of a stock solution, 5 mL of which makes 1-200 solution then diluted to 500 mL?

Answer 1

Answer:

8 ml diluent

Step-by-step explanation:

1:5 dilution = 1/5 dilution = 1 part sample and 4 parts diluent in a total of 5 parts. If you need 10 ml, final volume, then you need 1/5 of 10 ml = 2 ml sample. To bring this 2 ml sample up to a total volume of 10 ml, you must add 10 ml - 2 ml = 8 ml diluent.