Chemistry P5 -

[ousamah112]

AOA.
lets solve chemistry paper 5 together. Post your answers and any tips you know regarding attempting questions.
Jazak Allah Kharain..

 

[ousamah112]

useful website:
http://www.wonderhowto.com/how-to-make-up-standard-solution-chemistry-lab-259813/view/

 

[ousamah112]

how to prepare a dilution from a stock solution.​

You use the law of conservation of mass to perform the calculation for the dilution:​

MdilutionVdilution = MstockVstock​

As an example, say you need to prepare 50 ml of a 1.0 M solution from a 2.0 M stock solution. Your first step is to calculate the volume of stock solution that is required.​

MdilutionVdilution = MstockVstock​

(1.0 M)(50 ml) = (2.0 M)(x ml)​

x = [(1.0 M)(50 ml)]/2.0 M​

x = 25 ml of stock solution​

So to make your solution, you put 25 ml of stock solution into a 50 ml volumetric flask. Dilute with solvent to the 50 ml line.​

 

[smzimran]

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Physics / Chemistry / Bio P5 help