Experiment 3: Effects Of Changing Conc Or Temp On Equilibrium Position Flashcards Preview

Chem1048 Lab Test Prep > Experiment 3: Effects Of Changing Conc Or Temp On Equilibrium Position > Flashcards

Flashcards in Experiment 3: Effects Of Changing Conc Or Temp On Equilibrium Position Deck (1)
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1

A spectrophotometer can only measure the absorbance of very dilute solutions. Suggest what you would do to determine absorbance of a concentrated solution of Cr^3+.

- the solution must be diluted by adding distilled water
- a certain ration calculation of volume and concentration can be observed through a spectrophotometer —>
For a concentration of 0,04mol/L; v=100ml:
80 ml of 0,05mol/L will be used and thus diluted with 20ml of water for a 0,04mol^-1 concentration
- when the concentrated solution of Cr^3+ is diluted, Beer’s Law will be applicable:
A= Ęcl