dilution series Flashcards
A student wanted to produce a dilution series of a maltose solution so he could plot a calibration curve. He had a stock solution of maltose of concentration 0.6 mol dm−3 and distilled water. He made a series of dilutions from 0.1 to 0.6 mol dm−3.
(c) Complete the table below by giving all headings, units and the concentration of the maltose solution produced.
volume 0.6 mol dm3 maltose con 5 cm cubed
volume of distilled watercm3 10 cm
what is the concentration
I’m not amazig at dilutions but i will try; all the dilutions are of volume 15cm^3. Therefore if you think about it, a concentration of 0.6 moldom^-1 consists of 15 cm^3 of maltose and 0cm^3 of water. In the same way, if you therefore wanted a 0.3 moldm^-1 you would need half the amount of maltose so 7.5 cm^3 but therefore you also need 7.5 cm^3 of water. I have calculated this by doing 0.6/0.3 = 2 and therefore 15/2 = 7.5
Therefore you can work out the rest of the volumes for each solution in this way and the answer (if i’m not mistaken) is a concentration of 0.2 mold dm^-1
