posted by Ally on .
first, thanks so much Bob for helping me!!!!
Q4.you will be asked to prepare 25.0 mL of a 0.019 M solution of sodium chloride during this experiment....
a.calculate mass of sodium chloride needed to prepare solution.
(0.25L)(0.019M NaCl/L)*(58.5g NaCl/1mole NaCl)=0.278 g NaCl....is that correct? if not how should I go about finding the answer??
b.youre given 25mL volumetric flask. Describe the procedure you will follow in lab to prepare the solution in Question4a.
i don't know...i'm really bad at lab question...
c.you add 4.0mL of the NaCl solution from Q4a to a clean 25mL volumetric flask and dilute it to exactly 25.0mL. What is the concentration of the dilute solution?