When using the dilution law, is the volume of the first solution before dilution (V1) the same as the volume used to extract the first molarity (M1)? Please see the picture. For example, suppose I have a nano-material like CdS with a volume of two milliliters, and I am confused. Is this volume (V1) used twice in the dilution law? How can I extract the concentration of a solute if it is a core and core shell?