Question

Fill in the Blanks.

- A 1:10 ration, means that the final solution has been diluted ....... fold.

- If the original solution has 0.1 mole per liter and the ration is 1:5, the final concentration is ........ moles per liter.

- You have a 1 molar solution and need to do a 1:5 dilution to prepare a 40ml solution. This means you need ....... ml of the original 1 molar solution for this dilution.

Answer 1

Ans A 110 ration actually means that mining of a volume of original solution with q volume of salvent to make a total of 10 volume solution. Thus concentration of original solution diluted by 10 times . So A lolo ration, means that the final solution has been diluted 10 fold , - . 2nd case Ration. = 1% ñ - concentration of original solution = 011 mol/Litr. if initial volume = 1 volume then final volume should be ñ volume. SO final concentration Oil molellite x 1 velume 5 rolume = 0.02 mole/ Lite. Thus the final concentration is 0.02 mole / Litr.

→ 3rd case As the ration is to ū and initial - Concentration is I molar. So concentration of final solation Imolar XI Lume 5 volume = 0.2 molar.. Now we have to prepare 40 ml 0.2 moker solution from 1 molar solution . so the volume of emolar solution has to be taken = 40m2 x 012 malar Imalar = 8 me original 1 molar Thus solution & me of the needed.